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Finding the Fourth Proportional to 19,358.92, 26,718.42 and 10,978.12

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Solution

The fourth proportional to 19,358.92, 26,718.42 and 10,978.12 is: 15,151.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,358.92 : 26,718.42 = 10,978.12 : x
  2. Step 2: Convert to fraction form
    19,358.92/26,718.42 = 10,978.12/x
  3. Step 3: Cross multiply
    19,358.92x = 26,718.42 × 10,978.12
  4. Step 4: Simplify right side
    19,358.92x = 293,318,020.97
  5. Step 5: Solve for x
    x = 293,318,020.97/19,358.92
  6. Step 6: Final answer
    x = 15,151.57

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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.