Home / 12,947.11-19,423.76-7,686.70

Finding the Fourth Proportional to 12,947.11, 19,423.76 and 7,686.70

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Solution

The fourth proportional to 12,947.11, 19,423.76 and 7,686.70 is: 11,531.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,947.11 : 19,423.76 = 7,686.70 : x
  2. Step 2: Convert to fraction form
    12,947.11/19,423.76 = 7,686.70/x
  3. Step 3: Cross multiply
    12,947.11x = 19,423.76 × 7,686.70
  4. Step 4: Simplify right side
    12,947.11x = 149,304,615.99
  5. Step 5: Solve for x
    x = 149,304,615.99/12,947.11
  6. Step 6: Final answer
    x = 11,531.89

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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.