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Finding the Fourth Proportional to 38,993.62, 58,495.64 and 13,687.12

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Solution

The fourth proportional to 38,993.62, 58,495.64 and 13,687.12 is: 20,532.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,993.62 : 58,495.64 = 13,687.12 : x
  2. Step 2: Convert to fraction form
    38,993.62/58,495.64 = 13,687.12/x
  3. Step 3: Cross multiply
    38,993.62x = 58,495.64 × 13,687.12
  4. Step 4: Simplify right side
    38,993.62x = 800,636,844.16
  5. Step 5: Solve for x
    x = 800,636,844.16/38,993.62
  6. Step 6: Final answer
    x = 20,532.51

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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.