Home / 8,981.28-13,473.84-3,138.08

Finding the Fourth Proportional to 8,981.28, 13,473.84 and 3,138.08

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Solution

The fourth proportional to 8,981.28, 13,473.84 and 3,138.08 is: 4,707.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.28 : 13,473.84 = 3,138.08 : x
  2. Step 2: Convert to fraction form
    8,981.28/13,473.84 = 3,138.08/x
  3. Step 3: Cross multiply
    8,981.28x = 13,473.84 × 3,138.08
  4. Step 4: Simplify right side
    8,981.28x = 42,281,987.83
  5. Step 5: Solve for x
    x = 42,281,987.83/8,981.28
  6. Step 6: Final answer
    x = 4,707.79

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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.