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Finding the Fourth Proportional to 18,711.72, 28,061.74 and 6,228.82

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Solution

The fourth proportional to 18,711.72, 28,061.74 and 6,228.82 is: 9,341.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,711.72 : 28,061.74 = 6,228.82 : x
  2. Step 2: Convert to fraction form
    18,711.72/28,061.74 = 6,228.82/x
  3. Step 3: Cross multiply
    18,711.72x = 28,061.74 × 6,228.82
  4. Step 4: Simplify right side
    18,711.72x = 174,791,527.35
  5. Step 5: Solve for x
    x = 174,791,527.35/18,711.72
  6. Step 6: Final answer
    x = 9,341.29

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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.