Home / 39,425.90-54,409.03-21,521.87

Finding the Fourth Proportional to 39,425.90, 54,409.03 and 21,521.87

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Solution

The fourth proportional to 39,425.90, 54,409.03 and 21,521.87 is: 29,700.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,425.90 : 54,409.03 = 21,521.87 : x
  2. Step 2: Convert to fraction form
    39,425.90/54,409.03 = 21,521.87/x
  3. Step 3: Cross multiply
    39,425.90x = 54,409.03 × 21,521.87
  4. Step 4: Simplify right side
    39,425.90x = 1,170,983,798.44
  5. Step 5: Solve for x
    x = 1,170,983,798.44/39,425.90
  6. Step 6: Final answer
    x = 29,700.88

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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.