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Finding the Fourth Proportional to 28,812.60, 43,218.90 and 9,092.70

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Solution

The fourth proportional to 28,812.60, 43,218.90 and 9,092.70 is: 13,639.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,812.60 : 43,218.90 = 9,092.70 : x
  2. Step 2: Convert to fraction form
    28,812.60/43,218.90 = 9,092.70/x
  3. Step 3: Cross multiply
    28,812.60x = 43,218.90 × 9,092.70
  4. Step 4: Simplify right side
    28,812.60x = 392,976,492.03
  5. Step 5: Solve for x
    x = 392,976,492.03/28,812.60
  6. Step 6: Final answer
    x = 13,639.05

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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.