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Finding the Fourth Proportional to 18,353.72, 25,314.10 and 15,805.89

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Solution

The fourth proportional to 18,353.72, 25,314.10 and 15,805.89 is: 21,800.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,353.72 : 25,314.10 = 15,805.89 : x
  2. Step 2: Convert to fraction form
    18,353.72/25,314.10 = 15,805.89/x
  3. Step 3: Cross multiply
    18,353.72x = 25,314.10 × 15,805.89
  4. Step 4: Simplify right side
    18,353.72x = 400,111,753.48
  5. Step 5: Solve for x
    x = 400,111,753.48/18,353.72
  6. Step 6: Final answer
    x = 21,800.04

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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.