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Finding the Fourth Proportional to 38,998.99, 58,508.86 and 12,345.49

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Solution

The fourth proportional to 38,998.99, 58,508.86 and 12,345.49 is: 18,521.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,998.99 : 58,508.86 = 12,345.49 : x
  2. Step 2: Convert to fraction form
    38,998.99/58,508.86 = 12,345.49/x
  3. Step 3: Cross multiply
    38,998.99x = 58,508.86 × 12,345.49
  4. Step 4: Simplify right side
    38,998.99x = 722,320,546.04
  5. Step 5: Solve for x
    x = 722,320,546.04/38,998.99
  6. Step 6: Final answer
    x = 18,521.52

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Double scale
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Similar ratio
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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.