Home / 15,064.39-20,786.25-8,689.56

Finding the Fourth Proportional to 15,064.39, 20,786.25 and 8,689.56

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Solution

The fourth proportional to 15,064.39, 20,786.25 and 8,689.56 is: 11,990.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,064.39 : 20,786.25 = 8,689.56 : x
  2. Step 2: Convert to fraction form
    15,064.39/20,786.25 = 8,689.56/x
  3. Step 3: Cross multiply
    15,064.39x = 20,786.25 × 8,689.56
  4. Step 4: Simplify right side
    15,064.39x = 180,623,366.55
  5. Step 5: Solve for x
    x = 180,623,366.55/15,064.39
  6. Step 6: Final answer
    x = 11,990.09

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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.