Home / 38,939.40-58,411.17-12,642.21

Finding the Fourth Proportional to 38,939.40, 58,411.17 and 12,642.21

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Solution

The fourth proportional to 38,939.40, 58,411.17 and 12,642.21 is: 18,963.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,939.40 : 58,411.17 = 12,642.21 : x
  2. Step 2: Convert to fraction form
    38,939.40/58,411.17 = 12,642.21/x
  3. Step 3: Cross multiply
    38,939.40x = 58,411.17 × 12,642.21
  4. Step 4: Simplify right side
    38,939.40x = 738,446,277.49
  5. Step 5: Solve for x
    x = 738,446,277.49/38,939.40
  6. Step 6: Final answer
    x = 18,963.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.