Home / 13,137.02-18,129.28-7,834.92

Finding the Fourth Proportional to 13,137.02, 18,129.28 and 7,834.92

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Solution

The fourth proportional to 13,137.02, 18,129.28 and 7,834.92 is: 10,812.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.02 : 18,129.28 = 7,834.92 : x
  2. Step 2: Convert to fraction form
    13,137.02/18,129.28 = 7,834.92/x
  3. Step 3: Cross multiply
    13,137.02x = 18,129.28 × 7,834.92
  4. Step 4: Simplify right side
    13,137.02x = 142,041,458.46
  5. Step 5: Solve for x
    x = 142,041,458.46/13,137.02
  6. Step 6: Final answer
    x = 10,812.30

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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.