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Finding the Fourth Proportional to 38,988, 58,488.08 and 12,686.54

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Solution

The fourth proportional to 38,988, 58,488.08 and 12,686.54 is: 19,031.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,988 : 58,488.08 = 12,686.54 : x
  2. Step 2: Convert to fraction form
    38,988/58,488.08 = 12,686.54/x
  3. Step 3: Cross multiply
    38,988x = 58,488.08 × 12,686.54
  4. Step 4: Simplify right side
    38,988x = 742,011,010.57
  5. Step 5: Solve for x
    x = 742,011,010.57/38,988
  6. Step 6: Final answer
    x = 19,031.78

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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.