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Finding the Fourth Proportional to 28,380.60, 42,590.10 and 15,900.60

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Solution

The fourth proportional to 28,380.60, 42,590.10 and 15,900.60 is: 23,861.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.60 : 42,590.10 = 15,900.60 : x
  2. Step 2: Convert to fraction form
    28,380.60/42,590.10 = 15,900.60/x
  3. Step 3: Cross multiply
    28,380.60x = 42,590.10 × 15,900.60
  4. Step 4: Simplify right side
    28,380.60x = 677,208,144.06
  5. Step 5: Solve for x
    x = 677,208,144.06/28,380.60
  6. Step 6: Final answer
    x = 23,861.66

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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.