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Finding the Fourth Proportional to 28,241.72, 42,347.43 and 9,515.55

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Solution

The fourth proportional to 28,241.72, 42,347.43 and 9,515.55 is: 14,268.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,241.72 : 42,347.43 = 9,515.55 : x
  2. Step 2: Convert to fraction form
    28,241.72/42,347.43 = 9,515.55/x
  3. Step 3: Cross multiply
    28,241.72x = 42,347.43 × 9,515.55
  4. Step 4: Simplify right side
    28,241.72x = 402,959,087.54
  5. Step 5: Solve for x
    x = 402,959,087.54/28,241.72
  6. Step 6: Final answer
    x = 14,268.22

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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.