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Finding the Fourth Proportional to 11,392.20, 15,722.28 and 6,914.88

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Solution

The fourth proportional to 11,392.20, 15,722.28 and 6,914.88 is: 9,543.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,392.20 : 15,722.28 = 6,914.88 : x
  2. Step 2: Convert to fraction form
    11,392.20/15,722.28 = 6,914.88/x
  3. Step 3: Cross multiply
    11,392.20x = 15,722.28 × 6,914.88
  4. Step 4: Simplify right side
    11,392.20x = 108,717,679.53
  5. Step 5: Solve for x
    x = 108,717,679.53/11,392.20
  6. Step 6: Final answer
    x = 9,543.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.