Home / 6,279.12-9,415.56-2,117.70

Finding the Fourth Proportional to 6,279.12, 9,415.56 and 2,117.70

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Solution

The fourth proportional to 6,279.12, 9,415.56 and 2,117.70 is: 3,175.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,279.12 : 9,415.56 = 2,117.70 : x
  2. Step 2: Convert to fraction form
    6,279.12/9,415.56 = 2,117.70/x
  3. Step 3: Cross multiply
    6,279.12x = 9,415.56 × 2,117.70
  4. Step 4: Simplify right side
    6,279.12x = 19,939,331.41
  5. Step 5: Solve for x
    x = 19,939,331.41/6,279.12
  6. Step 6: Final answer
    x = 3,175.50

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Find fourth proportional to 3,139.56, 4,707.78 and 1,058.85
Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.