Home / 21,329.40-31,968.13-15,091.20

Finding the Fourth Proportional to 21,329.40, 31,968.13 and 15,091.20

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Solution

The fourth proportional to 21,329.40, 31,968.13 and 15,091.20 is: 22,618.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.40 : 31,968.13 = 15,091.20 : x
  2. Step 2: Convert to fraction form
    21,329.40/31,968.13 = 15,091.20/x
  3. Step 3: Cross multiply
    21,329.40x = 31,968.13 × 15,091.20
  4. Step 4: Simplify right side
    21,329.40x = 482,437,443.46
  5. Step 5: Solve for x
    x = 482,437,443.46/21,329.40
  6. Step 6: Final answer
    x = 22,618.43

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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.