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Finding the Fourth Proportional to 8,980.80, 13,471.68 and 3,138.24

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Solution

The fourth proportional to 8,980.80, 13,471.68 and 3,138.24 is: 4,707.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.80 : 13,471.68 = 3,138.24 : x
  2. Step 2: Convert to fraction form
    8,980.80/13,471.68 = 3,138.24/x
  3. Step 3: Cross multiply
    8,980.80x = 13,471.68 × 3,138.24
  4. Step 4: Simplify right side
    8,980.80x = 42,277,365.04
  5. Step 5: Solve for x
    x = 42,277,365.04/8,980.80
  6. Step 6: Final answer
    x = 4,707.53

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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.