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Finding the Fourth Proportional to 8,756.80, 13,134.24 and 4,139.20

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Solution

The fourth proportional to 8,756.80, 13,134.24 and 4,139.20 is: 6,208.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.80 : 13,134.24 = 4,139.20 : x
  2. Step 2: Convert to fraction form
    8,756.80/13,134.24 = 4,139.20/x
  3. Step 3: Cross multiply
    8,756.80x = 13,134.24 × 4,139.20
  4. Step 4: Simplify right side
    8,756.80x = 54,365,246.21
  5. Step 5: Solve for x
    x = 54,365,246.21/8,756.80
  6. Step 6: Final answer
    x = 6,208.35

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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.