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Finding the Fourth Proportional to 7,216.72, 9,933.16 and 5,117.20

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Solution

The fourth proportional to 7,216.72, 9,933.16 and 5,117.20 is: 7,043.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,216.72 : 9,933.16 = 5,117.20 : x
  2. Step 2: Convert to fraction form
    7,216.72/9,933.16 = 5,117.20/x
  3. Step 3: Cross multiply
    7,216.72x = 9,933.16 × 5,117.20
  4. Step 4: Simplify right side
    7,216.72x = 50,829,966.35
  5. Step 5: Solve for x
    x = 50,829,966.35/7,216.72
  6. Step 6: Final answer
    x = 7,043.36

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Half scale
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Similar ratio
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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.