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Finding the Fourth Proportional to 7,115.84, 10,672.80 and 1,922.12

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Solution

The fourth proportional to 7,115.84, 10,672.80 and 1,922.12 is: 2,882.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.84 : 10,672.80 = 1,922.12 : x
  2. Step 2: Convert to fraction form
    7,115.84/10,672.80 = 1,922.12/x
  3. Step 3: Cross multiply
    7,115.84x = 10,672.80 × 1,922.12
  4. Step 4: Simplify right side
    7,115.84x = 20,514,402.34
  5. Step 5: Solve for x
    x = 20,514,402.34/7,115.84
  6. Step 6: Final answer
    x = 2,882.92

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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.