Home / 39,031.89-53,863.90-21,126.75

Finding the Fourth Proportional to 39,031.89, 53,863.90 and 21,126.75

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Solution

The fourth proportional to 39,031.89, 53,863.90 and 21,126.75 is: 29,154.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,031.89 : 53,863.90 = 21,126.75 : x
  2. Step 2: Convert to fraction form
    39,031.89/53,863.90 = 21,126.75/x
  3. Step 3: Cross multiply
    39,031.89x = 53,863.90 × 21,126.75
  4. Step 4: Simplify right side
    39,031.89x = 1,137,969,149.33
  5. Step 5: Solve for x
    x = 1,137,969,149.33/39,031.89
  6. Step 6: Final answer
    x = 29,154.86

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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.