Home / 20,402.91-30,612.87-8,558.89

Finding the Fourth Proportional to 20,402.91, 30,612.87 and 8,558.89

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Solution

The fourth proportional to 20,402.91, 30,612.87 and 8,558.89 is: 12,841.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.91 : 30,612.87 = 8,558.89 : x
  2. Step 2: Convert to fraction form
    20,402.91/30,612.87 = 8,558.89/x
  3. Step 3: Cross multiply
    20,402.91x = 30,612.87 × 8,558.89
  4. Step 4: Simplify right side
    20,402.91x = 262,012,110.38
  5. Step 5: Solve for x
    x = 262,012,110.38/20,402.91
  6. Step 6: Final answer
    x = 12,841.90

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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.