Home / 8,918.70-12,306.91-4,939.42

Finding the Fourth Proportional to 8,918.70, 12,306.91 and 4,939.42

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Solution

The fourth proportional to 8,918.70, 12,306.91 and 4,939.42 is: 6,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.70 : 12,306.91 = 4,939.42 : x
  2. Step 2: Convert to fraction form
    8,918.70/12,306.91 = 4,939.42/x
  3. Step 3: Cross multiply
    8,918.70x = 12,306.91 × 4,939.42
  4. Step 4: Simplify right side
    8,918.70x = 60,788,997.39
  5. Step 5: Solve for x
    x = 60,788,997.39/8,918.70
  6. Step 6: Final answer
    x = 6,815.90

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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.