Home / 28,200.76-42,264.40-15,720.28

Finding the Fourth Proportional to 28,200.76, 42,264.40 and 15,720.28

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Solution

The fourth proportional to 28,200.76, 42,264.40 and 15,720.28 is: 23,559.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200.76 : 42,264.40 = 15,720.28 : x
  2. Step 2: Convert to fraction form
    28,200.76/42,264.40 = 15,720.28/x
  3. Step 3: Cross multiply
    28,200.76x = 42,264.40 × 15,720.28
  4. Step 4: Simplify right side
    28,200.76x = 664,408,202.03
  5. Step 5: Solve for x
    x = 664,408,202.03/28,200.76
  6. Step 6: Final answer
    x = 23,559.94

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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.