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Finding the Fourth Proportional to 38,995.90, 58,498.42 and 13,687.68

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Solution

The fourth proportional to 38,995.90, 58,498.42 and 13,687.68 is: 20,533.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,995.90 : 58,498.42 = 13,687.68 : x
  2. Step 2: Convert to fraction form
    38,995.90/58,498.42 = 13,687.68/x
  3. Step 3: Cross multiply
    38,995.90x = 58,498.42 × 13,687.68
  4. Step 4: Simplify right side
    38,995.90x = 800,707,653.47
  5. Step 5: Solve for x
    x = 800,707,653.47/38,995.90
  6. Step 6: Final answer
    x = 20,533.12

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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.