Home / 8,918.10-12,306.96-4,939.20

Finding the Fourth Proportional to 8,918.10, 12,306.96 and 4,939.20

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Solution

The fourth proportional to 8,918.10, 12,306.96 and 4,939.20 is: 6,816.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.10 : 12,306.96 = 4,939.20 : x
  2. Step 2: Convert to fraction form
    8,918.10/12,306.96 = 4,939.20/x
  3. Step 3: Cross multiply
    8,918.10x = 12,306.96 × 4,939.20
  4. Step 4: Simplify right side
    8,918.10x = 60,786,536.83
  5. Step 5: Solve for x
    x = 60,786,536.83/8,918.10
  6. Step 6: Final answer
    x = 6,816.09

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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.