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Finding the Fourth Proportional to 14,514.79, 21,781.90 and 5,280.79

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Solution

The fourth proportional to 14,514.79, 21,781.90 and 5,280.79 is: 7,924.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,514.79 : 21,781.90 = 5,280.79 : x
  2. Step 2: Convert to fraction form
    14,514.79/21,781.90 = 5,280.79/x
  3. Step 3: Cross multiply
    14,514.79x = 21,781.90 × 5,280.79
  4. Step 4: Simplify right side
    14,514.79x = 115,025,639.70
  5. Step 5: Solve for x
    x = 115,025,639.70/14,514.79
  6. Step 6: Final answer
    x = 7,924.72

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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.