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Finding the Fourth Proportional to 10,650.60, 15,978.66 and 5,108.22

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Solution

The fourth proportional to 10,650.60, 15,978.66 and 5,108.22 is: 7,663.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,650.60 : 15,978.66 = 5,108.22 : x
  2. Step 2: Convert to fraction form
    10,650.60/15,978.66 = 5,108.22/x
  3. Step 3: Cross multiply
    10,650.60x = 15,978.66 × 5,108.22
  4. Step 4: Simplify right side
    10,650.60x = 81,622,510.59
  5. Step 5: Solve for x
    x = 81,622,510.59/10,650.60
  6. Step 6: Final answer
    x = 7,663.65

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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.