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Finding the Fourth Proportional to 26,886.80, 40,330.20 and 21,357.20

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Solution

The fourth proportional to 26,886.80, 40,330.20 and 21,357.20 is: 32,035.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,886.80 : 40,330.20 = 21,357.20 : x
  2. Step 2: Convert to fraction form
    26,886.80/40,330.20 = 21,357.20/x
  3. Step 3: Cross multiply
    26,886.80x = 40,330.20 × 21,357.20
  4. Step 4: Simplify right side
    26,886.80x = 861,340,147.44
  5. Step 5: Solve for x
    x = 861,340,147.44/26,886.80
  6. Step 6: Final answer
    x = 32,035.80

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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.