Home / 28,568.12-42,868.38-15,420.20

Finding the Fourth Proportional to 28,568.12, 42,868.38 and 15,420.20

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Solution

The fourth proportional to 28,568.12, 42,868.38 and 15,420.20 is: 23,139.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,568.12 : 42,868.38 = 15,420.20 : x
  2. Step 2: Convert to fraction form
    28,568.12/42,868.38 = 15,420.20/x
  3. Step 3: Cross multiply
    28,568.12x = 42,868.38 × 15,420.20
  4. Step 4: Simplify right side
    28,568.12x = 661,038,993.28
  5. Step 5: Solve for x
    x = 661,038,993.28/28,568.12
  6. Step 6: Final answer
    x = 23,139.04

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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.