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Finding the Fourth Proportional to 18,937.92, 26,132.16 and 10,978.48

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Solution

The fourth proportional to 18,937.92, 26,132.16 and 10,978.48 is: 15,149.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.92 : 26,132.16 = 10,978.48 : x
  2. Step 2: Convert to fraction form
    18,937.92/26,132.16 = 10,978.48/x
  3. Step 3: Cross multiply
    18,937.92x = 26,132.16 × 10,978.48
  4. Step 4: Simplify right side
    18,937.92x = 286,891,395.92
  5. Step 5: Solve for x
    x = 286,891,395.92/18,937.92
  6. Step 6: Final answer
    x = 15,149.04

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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.