Home / 13,747.12-18,970.91-7,778.73

Finding the Fourth Proportional to 13,747.12, 18,970.91 and 7,778.73

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Solution

The fourth proportional to 13,747.12, 18,970.91 and 7,778.73 is: 10,734.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.12 : 18,970.91 = 7,778.73 : x
  2. Step 2: Convert to fraction form
    13,747.12/18,970.91 = 7,778.73/x
  3. Step 3: Cross multiply
    13,747.12x = 18,970.91 × 7,778.73
  4. Step 4: Simplify right side
    13,747.12x = 147,569,648.16
  5. Step 5: Solve for x
    x = 147,569,648.16/13,747.12
  6. Step 6: Final answer
    x = 10,734.59

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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.