Home / 13,318.13-19,958.15-9,780.39

Finding the Fourth Proportional to 13,318.13, 19,958.15 and 9,780.39

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Solution

The fourth proportional to 13,318.13, 19,958.15 and 9,780.39 is: 14,656.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.13 : 19,958.15 = 9,780.39 : x
  2. Step 2: Convert to fraction form
    13,318.13/19,958.15 = 9,780.39/x
  3. Step 3: Cross multiply
    13,318.13x = 19,958.15 × 9,780.39
  4. Step 4: Simplify right side
    13,318.13x = 195,198,490.68
  5. Step 5: Solve for x
    x = 195,198,490.68/13,318.13
  6. Step 6: Final answer
    x = 14,656.60

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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.