Home / 8,320.70-11,479.78-5,338.15

Finding the Fourth Proportional to 8,320.70, 11,479.78 and 5,338.15

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Solution

The fourth proportional to 8,320.70, 11,479.78 and 5,338.15 is: 7,364.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.70 : 11,479.78 = 5,338.15 : x
  2. Step 2: Convert to fraction form
    8,320.70/11,479.78 = 5,338.15/x
  3. Step 3: Cross multiply
    8,320.70x = 11,479.78 × 5,338.15
  4. Step 4: Simplify right side
    8,320.70x = 61,280,787.61
  5. Step 5: Solve for x
    x = 61,280,787.61/8,320.70
  6. Step 6: Final answer
    x = 7,364.86

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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.