Home / 21,324.20-31,986.30-16,869.80

Finding the Fourth Proportional to 21,324.20, 31,986.30 and 16,869.80

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Solution

The fourth proportional to 21,324.20, 31,986.30 and 16,869.80 is: 25,304.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.20 : 31,986.30 = 16,869.80 : x
  2. Step 2: Convert to fraction form
    21,324.20/31,986.30 = 16,869.80/x
  3. Step 3: Cross multiply
    21,324.20x = 31,986.30 × 16,869.80
  4. Step 4: Simplify right side
    21,324.20x = 539,602,483.74
  5. Step 5: Solve for x
    x = 539,602,483.74/21,324.20
  6. Step 6: Final answer
    x = 25,304.70

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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.