Home / 20,508.36-30,761.10-11,715.72

Finding the Fourth Proportional to 20,508.36, 30,761.10 and 11,715.72

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Solution

The fourth proportional to 20,508.36, 30,761.10 and 11,715.72 is: 17,572.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,508.36 : 30,761.10 = 11,715.72 : x
  2. Step 2: Convert to fraction form
    20,508.36/30,761.10 = 11,715.72/x
  3. Step 3: Cross multiply
    20,508.36x = 30,761.10 × 11,715.72
  4. Step 4: Simplify right side
    20,508.36x = 360,388,434.49
  5. Step 5: Solve for x
    x = 360,388,434.49/20,508.36
  6. Step 6: Final answer
    x = 17,572.76

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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.