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Finding the Fourth Proportional to 10,540.80, 15,811.20 and 4,396.80

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Solution

The fourth proportional to 10,540.80, 15,811.20 and 4,396.80 is: 6,595.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,540.80 : 15,811.20 = 4,396.80 : x
  2. Step 2: Convert to fraction form
    10,540.80/15,811.20 = 4,396.80/x
  3. Step 3: Cross multiply
    10,540.80x = 15,811.20 × 4,396.80
  4. Step 4: Simplify right side
    10,540.80x = 69,518,684.16
  5. Step 5: Solve for x
    x = 69,518,684.16/10,540.80
  6. Step 6: Final answer
    x = 6,595.20

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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.