Home / 13,747.22-18,971.18-7,778.77

Finding the Fourth Proportional to 13,747.22, 18,971.18 and 7,778.77

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Solution

The fourth proportional to 13,747.22, 18,971.18 and 7,778.77 is: 10,734.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.22 : 18,971.18 = 7,778.77 : x
  2. Step 2: Convert to fraction form
    13,747.22/18,971.18 = 7,778.77/x
  3. Step 3: Cross multiply
    13,747.22x = 18,971.18 × 7,778.77
  4. Step 4: Simplify right side
    13,747.22x = 147,572,388.70
  5. Step 5: Solve for x
    x = 147,572,388.70/13,747.22
  6. Step 6: Final answer
    x = 10,734.71

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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.