Home / 28,279.20-42,423.60-8,557.60

Finding the Fourth Proportional to 28,279.20, 42,423.60 and 8,557.60

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Solution

The fourth proportional to 28,279.20, 42,423.60 and 8,557.60 is: 12,837.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.20 : 42,423.60 = 8,557.60 : x
  2. Step 2: Convert to fraction form
    28,279.20/42,423.60 = 8,557.60/x
  3. Step 3: Cross multiply
    28,279.20x = 42,423.60 × 8,557.60
  4. Step 4: Simplify right side
    28,279.20x = 363,044,199.36
  5. Step 5: Solve for x
    x = 363,044,199.36/28,279.20
  6. Step 6: Final answer
    x = 12,837.85

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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.