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Finding the Fourth Proportional to 14,979.71, 20,671.85 and 8,265.40

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Solution

The fourth proportional to 14,979.71, 20,671.85 and 8,265.40 is: 11,406.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,979.71 : 20,671.85 = 8,265.40 : x
  2. Step 2: Convert to fraction form
    14,979.71/20,671.85 = 8,265.40/x
  3. Step 3: Cross multiply
    14,979.71x = 20,671.85 × 8,265.40
  4. Step 4: Simplify right side
    14,979.71x = 170,861,077.97
  5. Step 5: Solve for x
    x = 170,861,077.97/14,979.71
  6. Step 6: Final answer
    x = 11,406.17

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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.