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Finding the Fourth Proportional to 38,743.80, 58,115.70 and 11,038.20

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Solution

The fourth proportional to 38,743.80, 58,115.70 and 11,038.20 is: 16,557.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,743.80 : 58,115.70 = 11,038.20 : x
  2. Step 2: Convert to fraction form
    38,743.80/58,115.70 = 11,038.20/x
  3. Step 3: Cross multiply
    38,743.80x = 58,115.70 × 11,038.20
  4. Step 4: Simplify right side
    38,743.80x = 641,492,719.74
  5. Step 5: Solve for x
    x = 641,492,719.74/38,743.80
  6. Step 6: Final answer
    x = 16,557.30

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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.