Home / 28,102.55-42,156.66-9,126.39

Finding the Fourth Proportional to 28,102.55, 42,156.66 and 9,126.39

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Solution

The fourth proportional to 28,102.55, 42,156.66 and 9,126.39 is: 13,690.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.55 : 42,156.66 = 9,126.39 : x
  2. Step 2: Convert to fraction form
    28,102.55/42,156.66 = 9,126.39/x
  3. Step 3: Cross multiply
    28,102.55x = 42,156.66 × 9,126.39
  4. Step 4: Simplify right side
    28,102.55x = 384,738,120.26
  5. Step 5: Solve for x
    x = 384,738,120.26/28,102.55
  6. Step 6: Final answer
    x = 13,690.51

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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.