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Finding the Fourth Proportional to 38,706.93, 58,043.12 and 13,408.80

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Solution

The fourth proportional to 38,706.93, 58,043.12 and 13,408.80 is: 20,107.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,706.93 : 58,043.12 = 13,408.80 : x
  2. Step 2: Convert to fraction form
    38,706.93/58,043.12 = 13,408.80/x
  3. Step 3: Cross multiply
    38,706.93x = 58,043.12 × 13,408.80
  4. Step 4: Simplify right side
    38,706.93x = 778,288,587.46
  5. Step 5: Solve for x
    x = 778,288,587.46/38,706.93
  6. Step 6: Final answer
    x = 20,107.22

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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.