Home / 18,689.11-25,790.77-10,191.20

Finding the Fourth Proportional to 18,689.11, 25,790.77 and 10,191.20

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Solution

The fourth proportional to 18,689.11, 25,790.77 and 10,191.20 is: 14,063.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689.11 : 25,790.77 = 10,191.20 : x
  2. Step 2: Convert to fraction form
    18,689.11/25,790.77 = 10,191.20/x
  3. Step 3: Cross multiply
    18,689.11x = 25,790.77 × 10,191.20
  4. Step 4: Simplify right side
    18,689.11x = 262,838,934.22
  5. Step 5: Solve for x
    x = 262,838,934.22/18,689.11
  6. Step 6: Final answer
    x = 14,063.75

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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.