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Finding the Fourth Proportional to 7,216.60, 9,920.33 and 6,503.80

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Solution

The fourth proportional to 7,216.60, 9,920.33 and 6,503.80 is: 8,940.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,216.60 : 9,920.33 = 6,503.80 : x
  2. Step 2: Convert to fraction form
    7,216.60/9,920.33 = 6,503.80/x
  3. Step 3: Cross multiply
    7,216.60x = 9,920.33 × 6,503.80
  4. Step 4: Simplify right side
    7,216.60x = 64,519,842.25
  5. Step 5: Solve for x
    x = 64,519,842.25/7,216.60
  6. Step 6: Final answer
    x = 8,940.48

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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.