Home / 20,587.19-30,876.12-12,269.57

Finding the Fourth Proportional to 20,587.19, 30,876.12 and 12,269.57

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Solution

The fourth proportional to 20,587.19, 30,876.12 and 12,269.57 is: 18,401.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.19 : 30,876.12 = 12,269.57 : x
  2. Step 2: Convert to fraction form
    20,587.19/30,876.12 = 12,269.57/x
  3. Step 3: Cross multiply
    20,587.19x = 30,876.12 × 12,269.57
  4. Step 4: Simplify right side
    20,587.19x = 378,836,561.29
  5. Step 5: Solve for x
    x = 378,836,561.29/20,587.19
  6. Step 6: Final answer
    x = 18,401.57

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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.