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Finding the Fourth Proportional to 27,280.40, 40,920.60 and 8,812.40

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Solution

The fourth proportional to 27,280.40, 40,920.60 and 8,812.40 is: 13,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,280.40 : 40,920.60 = 8,812.40 : x
  2. Step 2: Convert to fraction form
    27,280.40/40,920.60 = 8,812.40/x
  3. Step 3: Cross multiply
    27,280.40x = 40,920.60 × 8,812.40
  4. Step 4: Simplify right side
    27,280.40x = 360,608,695.44
  5. Step 5: Solve for x
    x = 360,608,695.44/27,280.40
  6. Step 6: Final answer
    x = 13,218.60

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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.