Home / 13,318.88-18,380.05-9,788.69

Finding the Fourth Proportional to 13,318.88, 18,380.05 and 9,788.69

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Solution

The fourth proportional to 13,318.88, 18,380.05 and 9,788.69 is: 13,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.88 : 18,380.05 = 9,788.69 : x
  2. Step 2: Convert to fraction form
    13,318.88/18,380.05 = 9,788.69/x
  3. Step 3: Cross multiply
    13,318.88x = 18,380.05 × 9,788.69
  4. Step 4: Simplify right side
    13,318.88x = 179,916,633.11
  5. Step 5: Solve for x
    x = 179,916,633.11/13,318.88
  6. Step 6: Final answer
    x = 13,508.40

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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.