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Finding the Fourth Proportional to 8,920.56, 12,311.01 and 5,335.65

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Solution

The fourth proportional to 8,920.56, 12,311.01 and 5,335.65 is: 7,363.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.56 : 12,311.01 = 5,335.65 : x
  2. Step 2: Convert to fraction form
    8,920.56/12,311.01 = 5,335.65/x
  3. Step 3: Cross multiply
    8,920.56x = 12,311.01 × 5,335.65
  4. Step 4: Simplify right side
    8,920.56x = 65,687,240.51
  5. Step 5: Solve for x
    x = 65,687,240.51/8,920.56
  6. Step 6: Final answer
    x = 7,363.58

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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.