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Finding the Fourth Proportional to 17,281.79, 25,906.23 and 7,917.78

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Solution

The fourth proportional to 17,281.79, 25,906.23 and 7,917.78 is: 11,869.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,281.79 : 25,906.23 = 7,917.78 : x
  2. Step 2: Convert to fraction form
    17,281.79/25,906.23 = 7,917.78/x
  3. Step 3: Cross multiply
    17,281.79x = 25,906.23 × 7,917.78
  4. Step 4: Simplify right side
    17,281.79x = 205,119,829.77
  5. Step 5: Solve for x
    x = 205,119,829.77/17,281.79
  6. Step 6: Final answer
    x = 11,869.13

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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.