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Finding the Fourth Proportional to 21,786.80, 32,433.80 and 21,657.20

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Solution

The fourth proportional to 21,786.80, 32,433.80 and 21,657.20 is: 32,240.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,786.80 : 32,433.80 = 21,657.20 : x
  2. Step 2: Convert to fraction form
    21,786.80/32,433.80 = 21,657.20/x
  3. Step 3: Cross multiply
    21,786.80x = 32,433.80 × 21,657.20
  4. Step 4: Simplify right side
    21,786.80x = 702,425,293.36
  5. Step 5: Solve for x
    x = 702,425,293.36/21,786.80
  6. Step 6: Final answer
    x = 32,240.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.