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Finding the Fourth Proportional to 13,725.28, 18,941.04 and 8,061.28

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Solution

The fourth proportional to 13,725.28, 18,941.04 and 8,061.28 is: 11,124.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,725.28 : 18,941.04 = 8,061.28 : x
  2. Step 2: Convert to fraction form
    13,725.28/18,941.04 = 8,061.28/x
  3. Step 3: Cross multiply
    13,725.28x = 18,941.04 × 8,061.28
  4. Step 4: Simplify right side
    13,725.28x = 152,689,026.93
  5. Step 5: Solve for x
    x = 152,689,026.93/13,725.28
  6. Step 6: Final answer
    x = 11,124.66

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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.