Home / 13,170.23-19,770.78-10,398.77

Finding the Fourth Proportional to 13,170.23, 19,770.78 and 10,398.77

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Solution

The fourth proportional to 13,170.23, 19,770.78 and 10,398.77 is: 15,610.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,170.23 : 19,770.78 = 10,398.77 : x
  2. Step 2: Convert to fraction form
    13,170.23/19,770.78 = 10,398.77/x
  3. Step 3: Cross multiply
    13,170.23x = 19,770.78 × 10,398.77
  4. Step 4: Simplify right side
    13,170.23x = 205,591,793.94
  5. Step 5: Solve for x
    x = 205,591,793.94/13,170.23
  6. Step 6: Final answer
    x = 15,610.34

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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.