Home / 13,137.23-18,129.13-7,168.75

Finding the Fourth Proportional to 13,137.23, 18,129.13 and 7,168.75

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Solution

The fourth proportional to 13,137.23, 18,129.13 and 7,168.75 is: 9,892.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.23 : 18,129.13 = 7,168.75 : x
  2. Step 2: Convert to fraction form
    13,137.23/18,129.13 = 7,168.75/x
  3. Step 3: Cross multiply
    13,137.23x = 18,129.13 × 7,168.75
  4. Step 4: Simplify right side
    13,137.23x = 129,963,200.69
  5. Step 5: Solve for x
    x = 129,963,200.69/13,137.23
  6. Step 6: Final answer
    x = 9,892.74

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Half scale
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Double scale
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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.