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Finding the Fourth Proportional to 28,047.78, 38,705.67 and 15,472.44

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Solution

The fourth proportional to 28,047.78, 38,705.67 and 15,472.44 is: 21,351.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,047.78 : 38,705.67 = 15,472.44 : x
  2. Step 2: Convert to fraction form
    28,047.78/38,705.67 = 15,472.44/x
  3. Step 3: Cross multiply
    28,047.78x = 38,705.67 × 15,472.44
  4. Step 4: Simplify right side
    28,047.78x = 598,871,156.73
  5. Step 5: Solve for x
    x = 598,871,156.73/28,047.78
  6. Step 6: Final answer
    x = 21,351.82

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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.