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Finding the Fourth Proportional to 14,979.50, 20,671.71 and 8,355.50

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Solution

The fourth proportional to 14,979.50, 20,671.71 and 8,355.50 is: 11,530.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,979.50 : 20,671.71 = 8,355.50 : x
  2. Step 2: Convert to fraction form
    14,979.50/20,671.71 = 8,355.50/x
  3. Step 3: Cross multiply
    14,979.50x = 20,671.71 × 8,355.50
  4. Step 4: Simplify right side
    14,979.50x = 172,722,472.91
  5. Step 5: Solve for x
    x = 172,722,472.91/14,979.50
  6. Step 6: Final answer
    x = 11,530.59

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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.