Home / 28,129.12-42,069.60-25,031.20

Finding the Fourth Proportional to 28,129.12, 42,069.60 and 25,031.20

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Solution

The fourth proportional to 28,129.12, 42,069.60 and 25,031.20 is: 37,436.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.12 : 42,069.60 = 25,031.20 : x
  2. Step 2: Convert to fraction form
    28,129.12/42,069.60 = 25,031.20/x
  3. Step 3: Cross multiply
    28,129.12x = 42,069.60 × 25,031.20
  4. Step 4: Simplify right side
    28,129.12x = 1,053,052,571.52
  5. Step 5: Solve for x
    x = 1,053,052,571.52/28,129.12
  6. Step 6: Final answer
    x = 37,436.39

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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.