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Finding the Fourth Proportional to 20,593.47, 28,408.80 and 13,870.47

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Solution

The fourth proportional to 20,593.47, 28,408.80 and 13,870.47 is: 19,134.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,593.47 : 28,408.80 = 13,870.47 : x
  2. Step 2: Convert to fraction form
    20,593.47/28,408.80 = 13,870.47/x
  3. Step 3: Cross multiply
    20,593.47x = 28,408.80 × 13,870.47
  4. Step 4: Simplify right side
    20,593.47x = 394,043,408.14
  5. Step 5: Solve for x
    x = 394,043,408.14/20,593.47
  6. Step 6: Final answer
    x = 19,134.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.