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Finding the Fourth Proportional to 28,862.66, 43,289.66 and 9,138.66

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Solution

The fourth proportional to 28,862.66, 43,289.66 and 9,138.66 is: 13,706.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,862.66 : 43,289.66 = 9,138.66 : x
  2. Step 2: Convert to fraction form
    28,862.66/43,289.66 = 9,138.66/x
  3. Step 3: Cross multiply
    28,862.66x = 43,289.66 × 9,138.66
  4. Step 4: Simplify right side
    28,862.66x = 395,609,484.26
  5. Step 5: Solve for x
    x = 395,609,484.26/28,862.66
  6. Step 6: Final answer
    x = 13,706.62

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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.