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Finding the Fourth Proportional to 38,632.78, 57,948.09 and 12,339.10

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Solution

The fourth proportional to 38,632.78, 57,948.09 and 12,339.10 is: 18,508.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,632.78 : 57,948.09 = 12,339.10 : x
  2. Step 2: Convert to fraction form
    38,632.78/57,948.09 = 12,339.10/x
  3. Step 3: Cross multiply
    38,632.78x = 57,948.09 × 12,339.10
  4. Step 4: Simplify right side
    38,632.78x = 715,027,277.32
  5. Step 5: Solve for x
    x = 715,027,277.32/38,632.78
  6. Step 6: Final answer
    x = 18,508.31

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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.