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Finding the Fourth Proportional to 11,129.52, 15,353.52 and 6,411.06

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Solution

The fourth proportional to 11,129.52, 15,353.52 and 6,411.06 is: 8,844.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,129.52 : 15,353.52 = 6,411.06 : x
  2. Step 2: Convert to fraction form
    11,129.52/15,353.52 = 6,411.06/x
  3. Step 3: Cross multiply
    11,129.52x = 15,353.52 × 6,411.06
  4. Step 4: Simplify right side
    11,129.52x = 98,432,337.93
  5. Step 5: Solve for x
    x = 98,432,337.93/11,129.52
  6. Step 6: Final answer
    x = 8,844.26

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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.