Home / 28,156.72-42,241.10-10,387.44

Finding the Fourth Proportional to 28,156.72, 42,241.10 and 10,387.44

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Solution

The fourth proportional to 28,156.72, 42,241.10 and 10,387.44 is: 15,583.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.72 : 42,241.10 = 10,387.44 : x
  2. Step 2: Convert to fraction form
    28,156.72/42,241.10 = 10,387.44/x
  3. Step 3: Cross multiply
    28,156.72x = 42,241.10 × 10,387.44
  4. Step 4: Simplify right side
    28,156.72x = 438,776,891.78
  5. Step 5: Solve for x
    x = 438,776,891.78/28,156.72
  6. Step 6: Final answer
    x = 15,583.38

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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.