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Finding the Fourth Proportional to 11,411.40, 17,116.86 and 5,255.40

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Solution

The fourth proportional to 11,411.40, 17,116.86 and 5,255.40 is: 7,882.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,411.40 : 17,116.86 = 5,255.40 : x
  2. Step 2: Convert to fraction form
    11,411.40/17,116.86 = 5,255.40/x
  3. Step 3: Cross multiply
    11,411.40x = 17,116.86 × 5,255.40
  4. Step 4: Simplify right side
    11,411.40x = 89,955,946.04
  5. Step 5: Solve for x
    x = 89,955,946.04/11,411.40
  6. Step 6: Final answer
    x = 7,882.99

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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.