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Finding the Fourth Proportional to 21,814.80, 32,722.20 and 18,542.40

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Solution

The fourth proportional to 21,814.80, 32,722.20 and 18,542.40 is: 27,813.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,814.80 : 32,722.20 = 18,542.40 : x
  2. Step 2: Convert to fraction form
    21,814.80/32,722.20 = 18,542.40/x
  3. Step 3: Cross multiply
    21,814.80x = 32,722.20 × 18,542.40
  4. Step 4: Simplify right side
    21,814.80x = 606,748,121.28
  5. Step 5: Solve for x
    x = 606,748,121.28/21,814.80
  6. Step 6: Final answer
    x = 27,813.60

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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.