Home / 39,031.54-53,863.60-21,126.70

Finding the Fourth Proportional to 39,031.54, 53,863.60 and 21,126.70

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Solution

The fourth proportional to 39,031.54, 53,863.60 and 21,126.70 is: 29,154.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,031.54 : 53,863.60 = 21,126.70 : x
  2. Step 2: Convert to fraction form
    39,031.54/53,863.60 = 21,126.70/x
  3. Step 3: Cross multiply
    39,031.54x = 53,863.60 × 21,126.70
  4. Step 4: Simplify right side
    39,031.54x = 1,137,960,118.12
  5. Step 5: Solve for x
    x = 1,137,960,118.12/39,031.54
  6. Step 6: Final answer
    x = 29,154.89

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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.