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Finding the Fourth Proportional to 27,120.80, 40,681.20 and 17,819.60

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Solution

The fourth proportional to 27,120.80, 40,681.20 and 17,819.60 is: 26,729.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,120.80 : 40,681.20 = 17,819.60 : x
  2. Step 2: Convert to fraction form
    27,120.80/40,681.20 = 17,819.60/x
  3. Step 3: Cross multiply
    27,120.80x = 40,681.20 × 17,819.60
  4. Step 4: Simplify right side
    27,120.80x = 724,922,711.52
  5. Step 5: Solve for x
    x = 724,922,711.52/27,120.80
  6. Step 6: Final answer
    x = 26,729.40

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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.