Home / 20,899.12-31,341.39-9,205.96

Finding the Fourth Proportional to 20,899.12, 31,341.39 and 9,205.96

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Solution

The fourth proportional to 20,899.12, 31,341.39 and 9,205.96 is: 13,805.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.12 : 31,341.39 = 9,205.96 : x
  2. Step 2: Convert to fraction form
    20,899.12/31,341.39 = 9,205.96/x
  3. Step 3: Cross multiply
    20,899.12x = 31,341.39 × 9,205.96
  4. Step 4: Simplify right side
    20,899.12x = 288,527,582.68
  5. Step 5: Solve for x
    x = 288,527,582.68/20,899.12
  6. Step 6: Final answer
    x = 13,805.73

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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.