Home / 18,660.11-25,745.85-12,988.49

Finding the Fourth Proportional to 18,660.11, 25,745.85 and 12,988.49

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Solution

The fourth proportional to 18,660.11, 25,745.85 and 12,988.49 is: 17,920.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660.11 : 25,745.85 = 12,988.49 : x
  2. Step 2: Convert to fraction form
    18,660.11/25,745.85 = 12,988.49/x
  3. Step 3: Cross multiply
    18,660.11x = 25,745.85 × 12,988.49
  4. Step 4: Simplify right side
    18,660.11x = 334,399,715.27
  5. Step 5: Solve for x
    x = 334,399,715.27/18,660.11
  6. Step 6: Final answer
    x = 17,920.57

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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.