Home / 21,426.40-32,139.60-19,244.80

Finding the Fourth Proportional to 21,426.40, 32,139.60 and 19,244.80

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Solution

The fourth proportional to 21,426.40, 32,139.60 and 19,244.80 is: 28,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,426.40 : 32,139.60 = 19,244.80 : x
  2. Step 2: Convert to fraction form
    21,426.40/32,139.60 = 19,244.80/x
  3. Step 3: Cross multiply
    21,426.40x = 32,139.60 × 19,244.80
  4. Step 4: Simplify right side
    21,426.40x = 618,520,174.08
  5. Step 5: Solve for x
    x = 618,520,174.08/21,426.40
  6. Step 6: Final answer
    x = 28,867.20

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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.