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Finding the Fourth Proportional to 8,981.40, 13,472.10 and 3,509.40

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Solution

The fourth proportional to 8,981.40, 13,472.10 and 3,509.40 is: 5,264.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,981.40 : 13,472.10 = 3,509.40 : x
  2. Step 2: Convert to fraction form
    8,981.40/13,472.10 = 3,509.40/x
  3. Step 3: Cross multiply
    8,981.40x = 13,472.10 × 3,509.40
  4. Step 4: Simplify right side
    8,981.40x = 47,278,987.74
  5. Step 5: Solve for x
    x = 47,278,987.74/8,981.40
  6. Step 6: Final answer
    x = 5,264.10

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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.