Home / 3,108.76-4,284.48-2,520.70

Finding the Fourth Proportional to 3,108.76, 4,284.48 and 2,520.70

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Solution

The fourth proportional to 3,108.76, 4,284.48 and 2,520.70 is: 3,474.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.76 : 4,284.48 = 2,520.70 : x
  2. Step 2: Convert to fraction form
    3,108.76/4,284.48 = 2,520.70/x
  3. Step 3: Cross multiply
    3,108.76x = 4,284.48 × 2,520.70
  4. Step 4: Simplify right side
    3,108.76x = 10,799,888.74
  5. Step 5: Solve for x
    x = 10,799,888.74/3,108.76
  6. Step 6: Final answer
    x = 3,474.02

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Half scale
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Double scale
Find fourth proportional to 3,109.76, 4,285.86 and 2,521.70
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.