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Finding the Fourth Proportional to 10,378.80, 15,565.80 and 3,451.44

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Solution

The fourth proportional to 10,378.80, 15,565.80 and 3,451.44 is: 5,176.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,378.80 : 15,565.80 = 3,451.44 : x
  2. Step 2: Convert to fraction form
    10,378.80/15,565.80 = 3,451.44/x
  3. Step 3: Cross multiply
    10,378.80x = 15,565.80 × 3,451.44
  4. Step 4: Simplify right side
    10,378.80x = 53,724,424.75
  5. Step 5: Solve for x
    x = 53,724,424.75/10,378.80
  6. Step 6: Final answer
    x = 5,176.36

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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.