Home / 13,747.11-18,966.06-7,778.72

Finding the Fourth Proportional to 13,747.11, 18,966.06 and 7,778.72

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Solution

The fourth proportional to 13,747.11, 18,966.06 and 7,778.72 is: 10,731.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.11 : 18,966.06 = 7,778.72 : x
  2. Step 2: Convert to fraction form
    13,747.11/18,966.06 = 7,778.72/x
  3. Step 3: Cross multiply
    13,747.11x = 18,966.06 × 7,778.72
  4. Step 4: Simplify right side
    13,747.11x = 147,531,575.41
  5. Step 5: Solve for x
    x = 147,531,575.41/13,747.11
  6. Step 6: Final answer
    x = 10,731.82

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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.