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Finding the Fourth Proportional to 28,896.48, 39,882.48 and 18,278.88

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Solution

The fourth proportional to 28,896.48, 39,882.48 and 18,278.88 is: 25,228.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,896.48 : 39,882.48 = 18,278.88 : x
  2. Step 2: Convert to fraction form
    28,896.48/39,882.48 = 18,278.88/x
  3. Step 3: Cross multiply
    28,896.48x = 39,882.48 × 18,278.88
  4. Step 4: Simplify right side
    28,896.48x = 729,007,066.02
  5. Step 5: Solve for x
    x = 729,007,066.02/28,896.48
  6. Step 6: Final answer
    x = 25,228.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.