Home / 28,916.20-43,374.30-8,139.70

Finding the Fourth Proportional to 28,916.20, 43,374.30 and 8,139.70

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Solution

The fourth proportional to 28,916.20, 43,374.30 and 8,139.70 is: 12,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,916.20 : 43,374.30 = 8,139.70 : x
  2. Step 2: Convert to fraction form
    28,916.20/43,374.30 = 8,139.70/x
  3. Step 3: Cross multiply
    28,916.20x = 43,374.30 × 8,139.70
  4. Step 4: Simplify right side
    28,916.20x = 353,053,789.71
  5. Step 5: Solve for x
    x = 353,053,789.71/28,916.20
  6. Step 6: Final answer
    x = 12,209.55

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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.