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Finding the Fourth Proportional to 7,216.80, 9,920.95 and 6,204.78

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Solution

The fourth proportional to 7,216.80, 9,920.95 and 6,204.78 is: 8,529.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,216.80 : 9,920.95 = 6,204.78 : x
  2. Step 2: Convert to fraction form
    7,216.80/9,920.95 = 6,204.78/x
  3. Step 3: Cross multiply
    7,216.80x = 9,920.95 × 6,204.78
  4. Step 4: Simplify right side
    7,216.80x = 61,557,312.14
  5. Step 5: Solve for x
    x = 61,557,312.14/7,216.80
  6. Step 6: Final answer
    x = 8,529.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.