Home / 38,387.89-52,968.28-21,391.71

Finding the Fourth Proportional to 38,387.89, 52,968.28 and 21,391.71

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Solution

The fourth proportional to 38,387.89, 52,968.28 and 21,391.71 is: 29,516.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,387.89 : 52,968.28 = 21,391.71 : x
  2. Step 2: Convert to fraction form
    38,387.89/52,968.28 = 21,391.71/x
  3. Step 3: Cross multiply
    38,387.89x = 52,968.28 × 21,391.71
  4. Step 4: Simplify right side
    38,387.89x = 1,133,082,170.90
  5. Step 5: Solve for x
    x = 1,133,082,170.90/38,387.89
  6. Step 6: Final answer
    x = 29,516.66

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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.