Home / 28,129.88-42,147.40-17,002.64

Finding the Fourth Proportional to 28,129.88, 42,147.40 and 17,002.64

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Solution

The fourth proportional to 28,129.88, 42,147.40 and 17,002.64 is: 25,475.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.88 : 42,147.40 = 17,002.64 : x
  2. Step 2: Convert to fraction form
    28,129.88/42,147.40 = 17,002.64/x
  3. Step 3: Cross multiply
    28,129.88x = 42,147.40 × 17,002.64
  4. Step 4: Simplify right side
    28,129.88x = 716,617,069.14
  5. Step 5: Solve for x
    x = 716,617,069.14/28,129.88
  6. Step 6: Final answer
    x = 25,475.30

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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.