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Finding the Fourth Proportional to 28,812.80, 43,251.60 and 17,132.60

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Solution

The fourth proportional to 28,812.80, 43,251.60 and 17,132.60 is: 25,718.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,812.80 : 43,251.60 = 17,132.60 : x
  2. Step 2: Convert to fraction form
    28,812.80/43,251.60 = 17,132.60/x
  3. Step 3: Cross multiply
    28,812.80x = 43,251.60 × 17,132.60
  4. Step 4: Simplify right side
    28,812.80x = 741,012,362.16
  5. Step 5: Solve for x
    x = 741,012,362.16/28,812.80
  6. Step 6: Final answer
    x = 25,718.17

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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.