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Finding the Fourth Proportional to 18,876.46, 28,315.08 and 6,868.20

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Solution

The fourth proportional to 18,876.46, 28,315.08 and 6,868.20 is: 10,302.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876.46 : 28,315.08 = 6,868.20 : x
  2. Step 2: Convert to fraction form
    18,876.46/28,315.08 = 6,868.20/x
  3. Step 3: Cross multiply
    18,876.46x = 28,315.08 × 6,868.20
  4. Step 4: Simplify right side
    18,876.46x = 194,473,632.46
  5. Step 5: Solve for x
    x = 194,473,632.46/18,876.46
  6. Step 6: Final answer
    x = 10,302.44

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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.