Home / 21,365.71-29,472.36-12,861.92

Finding the Fourth Proportional to 21,365.71, 29,472.36 and 12,861.92

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Solution

The fourth proportional to 21,365.71, 29,472.36 and 12,861.92 is: 17,742.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,365.71 : 29,472.36 = 12,861.92 : x
  2. Step 2: Convert to fraction form
    21,365.71/29,472.36 = 12,861.92/x
  3. Step 3: Cross multiply
    21,365.71x = 29,472.36 × 12,861.92
  4. Step 4: Simplify right side
    21,365.71x = 379,071,161.98
  5. Step 5: Solve for x
    x = 379,071,161.98/21,365.71
  6. Step 6: Final answer
    x = 17,742.04

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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.