Home / 38,939.90-58,423.41-12,290.00

Finding the Fourth Proportional to 38,939.90, 58,423.41 and 12,290.00

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Solution

The fourth proportional to 38,939.90, 58,423.41 and 12,290.00 is: 18,439.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,939.90 : 58,423.41 = 12,290.00 : x
  2. Step 2: Convert to fraction form
    38,939.90/58,423.41 = 12,290.00/x
  3. Step 3: Cross multiply
    38,939.90x = 58,423.41 × 12,290.00
  4. Step 4: Simplify right side
    38,939.90x = 718,023,416.78
  5. Step 5: Solve for x
    x = 718,023,416.78/38,939.90
  6. Step 6: Final answer
    x = 18,439.27

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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.