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Finding the Fourth Proportional to 20,559.70, 28,373.07 and 12,600.39

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Solution

The fourth proportional to 20,559.70, 28,373.07 and 12,600.39 is: 17,388.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.70 : 28,373.07 = 12,600.39 : x
  2. Step 2: Convert to fraction form
    20,559.70/28,373.07 = 12,600.39/x
  3. Step 3: Cross multiply
    20,559.70x = 28,373.07 × 12,600.39
  4. Step 4: Simplify right side
    20,559.70x = 357,511,605.63
  5. Step 5: Solve for x
    x = 357,511,605.63/20,559.70
  6. Step 6: Final answer
    x = 17,388.95

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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.