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Finding the Fourth Proportional to 15,561.78, 21,472.03 and 9,100.17

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Solution

The fourth proportional to 15,561.78, 21,472.03 and 9,100.17 is: 12,556.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,561.78 : 21,472.03 = 9,100.17 : x
  2. Step 2: Convert to fraction form
    15,561.78/21,472.03 = 9,100.17/x
  3. Step 3: Cross multiply
    15,561.78x = 21,472.03 × 9,100.17
  4. Step 4: Simplify right side
    15,561.78x = 195,399,123.25
  5. Step 5: Solve for x
    x = 195,399,123.25/15,561.78
  6. Step 6: Final answer
    x = 12,556.35

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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.