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Finding the Fourth Proportional to 11,392.17, 15,720.98 and 6,288.17

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Solution

The fourth proportional to 11,392.17, 15,720.98 and 6,288.17 is: 8,677.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,392.17 : 15,720.98 = 6,288.17 : x
  2. Step 2: Convert to fraction form
    11,392.17/15,720.98 = 6,288.17/x
  3. Step 3: Cross multiply
    11,392.17x = 15,720.98 × 6,288.17
  4. Step 4: Simplify right side
    11,392.17x = 98,856,084.76
  5. Step 5: Solve for x
    x = 98,856,084.76/11,392.17
  6. Step 6: Final answer
    x = 8,677.55

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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.