Home / 7,130.76-9,840.54-3,987.18

Finding the Fourth Proportional to 7,130.76, 9,840.54 and 3,987.18

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Solution

The fourth proportional to 7,130.76, 9,840.54 and 3,987.18 is: 5,502.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.76 : 9,840.54 = 3,987.18 : x
  2. Step 2: Convert to fraction form
    7,130.76/9,840.54 = 3,987.18/x
  3. Step 3: Cross multiply
    7,130.76x = 9,840.54 × 3,987.18
  4. Step 4: Simplify right side
    7,130.76x = 39,236,004.28
  5. Step 5: Solve for x
    x = 39,236,004.28/7,130.76
  6. Step 6: Final answer
    x = 5,502.36

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.