Home / 21,711.32-29,957.80-13,330.52

Finding the Fourth Proportional to 21,711.32, 29,957.80 and 13,330.52

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Solution

The fourth proportional to 21,711.32, 29,957.80 and 13,330.52 is: 18,393.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,711.32 : 29,957.80 = 13,330.52 : x
  2. Step 2: Convert to fraction form
    21,711.32/29,957.80 = 13,330.52/x
  3. Step 3: Cross multiply
    21,711.32x = 29,957.80 × 13,330.52
  4. Step 4: Simplify right side
    21,711.32x = 399,353,052.06
  5. Step 5: Solve for x
    x = 399,353,052.06/21,711.32
  6. Step 6: Final answer
    x = 18,393.77

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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.