Home / 21,553.04-29,743.08-12,121.40

Finding the Fourth Proportional to 21,553.04, 29,743.08 and 12,121.40

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Solution

The fourth proportional to 21,553.04, 29,743.08 and 12,121.40 is: 16,727.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,553.04 : 29,743.08 = 12,121.40 : x
  2. Step 2: Convert to fraction form
    21,553.04/29,743.08 = 12,121.40/x
  3. Step 3: Cross multiply
    21,553.04x = 29,743.08 × 12,121.40
  4. Step 4: Simplify right side
    21,553.04x = 360,527,769.91
  5. Step 5: Solve for x
    x = 360,527,769.91/21,553.04
  6. Step 6: Final answer
    x = 16,727.47

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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.