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Finding the Fourth Proportional to 28,194.60, 42,279.10 and 10,658.60

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Solution

The fourth proportional to 28,194.60, 42,279.10 and 10,658.60 is: 15,983.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,194.60 : 42,279.10 = 10,658.60 : x
  2. Step 2: Convert to fraction form
    28,194.60/42,279.10 = 10,658.60/x
  3. Step 3: Cross multiply
    28,194.60x = 42,279.10 × 10,658.60
  4. Step 4: Simplify right side
    28,194.60x = 450,636,015.26
  5. Step 5: Solve for x
    x = 450,636,015.26/28,194.60
  6. Step 6: Final answer
    x = 15,983.06

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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.