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Finding the Fourth Proportional to 12,797.76, 17,660.88 and 7,208.72

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Solution

The fourth proportional to 12,797.76, 17,660.88 and 7,208.72 is: 9,948.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,797.76 : 17,660.88 = 7,208.72 : x
  2. Step 2: Convert to fraction form
    12,797.76/17,660.88 = 7,208.72/x
  3. Step 3: Cross multiply
    12,797.76x = 17,660.88 × 7,208.72
  4. Step 4: Simplify right side
    12,797.76x = 127,312,338.87
  5. Step 5: Solve for x
    x = 127,312,338.87/12,797.76
  6. Step 6: Final answer
    x = 9,948.02

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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.