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Finding the Fourth Proportional to 28,856.66, 43,280.66 and 9,132.66

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Solution

The fourth proportional to 28,856.66, 43,280.66 and 9,132.66 is: 13,697.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,856.66 : 43,280.66 = 9,132.66 : x
  2. Step 2: Convert to fraction form
    28,856.66/43,280.66 = 9,132.66/x
  3. Step 3: Cross multiply
    28,856.66x = 43,280.66 × 9,132.66
  4. Step 4: Simplify right side
    28,856.66x = 395,267,552.36
  5. Step 5: Solve for x
    x = 395,267,552.36/28,856.66
  6. Step 6: Final answer
    x = 13,697.62

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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.