Home / 12,947.70-19,421.55-7,115.70

Finding the Fourth Proportional to 12,947.70, 19,421.55 and 7,115.70

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Solution

The fourth proportional to 12,947.70, 19,421.55 and 7,115.70 is: 10,673.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.70 : 19,421.55 = 7,115.70 : x
  2. Step 2: Convert to fraction form
    12,947.70/19,421.55 = 7,115.70/x
  3. Step 3: Cross multiply
    12,947.70x = 19,421.55 × 7,115.70
  4. Step 4: Simplify right side
    12,947.70x = 138,197,923.34
  5. Step 5: Solve for x
    x = 138,197,923.34/12,947.70
  6. Step 6: Final answer
    x = 10,673.55

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Similar ratio
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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.