Home / 21,553.32-29,743.58-12,121.88

Finding the Fourth Proportional to 21,553.32, 29,743.58 and 12,121.88

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Solution

The fourth proportional to 21,553.32, 29,743.58 and 12,121.88 is: 16,728.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,553.32 : 29,743.58 = 12,121.88 : x
  2. Step 2: Convert to fraction form
    21,553.32/29,743.58 = 12,121.88/x
  3. Step 3: Cross multiply
    21,553.32x = 29,743.58 × 12,121.88
  4. Step 4: Simplify right side
    21,553.32x = 360,547,898.20
  5. Step 5: Solve for x
    x = 360,547,898.20/21,553.32
  6. Step 6: Final answer
    x = 16,728.18

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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.