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Finding the Fourth Proportional to 28,461.86, 42,694.86 and 10,931.69

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Solution

The fourth proportional to 28,461.86, 42,694.86 and 10,931.69 is: 16,398.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,461.86 : 42,694.86 = 10,931.69 : x
  2. Step 2: Convert to fraction form
    28,461.86/42,694.86 = 10,931.69/x
  3. Step 3: Cross multiply
    28,461.86x = 42,694.86 × 10,931.69
  4. Step 4: Simplify right side
    28,461.86x = 466,726,974.11
  5. Step 5: Solve for x
    x = 466,726,974.11/28,461.86
  6. Step 6: Final answer
    x = 16,398.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.