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Finding the Fourth Proportional to 10,376.80, 15,565.20 and 2,980.60

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Solution

The fourth proportional to 10,376.80, 15,565.20 and 2,980.60 is: 4,470.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,376.80 : 15,565.20 = 2,980.60 : x
  2. Step 2: Convert to fraction form
    10,376.80/15,565.20 = 2,980.60/x
  3. Step 3: Cross multiply
    10,376.80x = 15,565.20 × 2,980.60
  4. Step 4: Simplify right side
    10,376.80x = 46,393,635.12
  5. Step 5: Solve for x
    x = 46,393,635.12/10,376.80
  6. Step 6: Final answer
    x = 4,470.90

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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.