Home / 39,215.52-54,115.20-21,310.40

Finding the Fourth Proportional to 39,215.52, 54,115.20 and 21,310.40

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Solution

The fourth proportional to 39,215.52, 54,115.20 and 21,310.40 is: 29,407.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,215.52 : 54,115.20 = 21,310.40 : x
  2. Step 2: Convert to fraction form
    39,215.52/54,115.20 = 21,310.40/x
  3. Step 3: Cross multiply
    39,215.52x = 54,115.20 × 21,310.40
  4. Step 4: Simplify right side
    39,215.52x = 1,153,216,287.50
  5. Step 5: Solve for x
    x = 1,153,216,287.50/39,215.52
  6. Step 6: Final answer
    x = 29,407.14

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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.