Home / 12,770.54-19,139.18-7,147.97

Finding the Fourth Proportional to 12,770.54, 19,139.18 and 7,147.97

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Solution

The fourth proportional to 12,770.54, 19,139.18 and 7,147.97 is: 10,712.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,770.54 : 19,139.18 = 7,147.97 : x
  2. Step 2: Convert to fraction form
    12,770.54/19,139.18 = 7,147.97/x
  3. Step 3: Cross multiply
    12,770.54x = 19,139.18 × 7,147.97
  4. Step 4: Simplify right side
    12,770.54x = 136,806,284.46
  5. Step 5: Solve for x
    x = 136,806,284.46/12,770.54
  6. Step 6: Final answer
    x = 10,712.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.