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Finding the Fourth Proportional to 38,676.48, 58,015.80 and 12,400.80

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Solution

The fourth proportional to 38,676.48, 58,015.80 and 12,400.80 is: 18,601.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,676.48 : 58,015.80 = 12,400.80 : x
  2. Step 2: Convert to fraction form
    38,676.48/58,015.80 = 12,400.80/x
  3. Step 3: Cross multiply
    38,676.48x = 58,015.80 × 12,400.80
  4. Step 4: Simplify right side
    38,676.48x = 719,442,332.64
  5. Step 5: Solve for x
    x = 719,442,332.64/38,676.48
  6. Step 6: Final answer
    x = 18,601.55

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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.