Home / 12,964.80-17,890.70-7,660.11

Finding the Fourth Proportional to 12,964.80, 17,890.70 and 7,660.11

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Solution

The fourth proportional to 12,964.80, 17,890.70 and 7,660.11 is: 10,570.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,964.80 : 17,890.70 = 7,660.11 : x
  2. Step 2: Convert to fraction form
    12,964.80/17,890.70 = 7,660.11/x
  3. Step 3: Cross multiply
    12,964.80x = 17,890.70 × 7,660.11
  4. Step 4: Simplify right side
    12,964.80x = 137,044,691.68
  5. Step 5: Solve for x
    x = 137,044,691.68/12,964.80
  6. Step 6: Final answer
    x = 10,570.52

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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.