Home / 21,133.20-31,681.96-13,324.80

Finding the Fourth Proportional to 21,133.20, 31,681.96 and 13,324.80

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Solution

The fourth proportional to 21,133.20, 31,681.96 and 13,324.80 is: 19,975.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.20 : 31,681.96 = 13,324.80 : x
  2. Step 2: Convert to fraction form
    21,133.20/31,681.96 = 13,324.80/x
  3. Step 3: Cross multiply
    21,133.20x = 31,681.96 × 13,324.80
  4. Step 4: Simplify right side
    21,133.20x = 422,155,780.61
  5. Step 5: Solve for x
    x = 422,155,780.61/21,133.20
  6. Step 6: Final answer
    x = 19,975.95

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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.