Home / 28,422.88-39,227.28-20,491.36

Finding the Fourth Proportional to 28,422.88, 39,227.28 and 20,491.36

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Solution

The fourth proportional to 28,422.88, 39,227.28 and 20,491.36 is: 28,280.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,422.88 : 39,227.28 = 20,491.36 : x
  2. Step 2: Convert to fraction form
    28,422.88/39,227.28 = 20,491.36/x
  3. Step 3: Cross multiply
    28,422.88x = 39,227.28 × 20,491.36
  4. Step 4: Simplify right side
    28,422.88x = 803,820,316.30
  5. Step 5: Solve for x
    x = 803,820,316.30/28,422.88
  6. Step 6: Final answer
    x = 28,280.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.