Home / 20,774.75-31,162.12-9,689.19

Finding the Fourth Proportional to 20,774.75, 31,162.12 and 9,689.19

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Solution

The fourth proportional to 20,774.75, 31,162.12 and 9,689.19 is: 14,533.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.75 : 31,162.12 = 9,689.19 : x
  2. Step 2: Convert to fraction form
    20,774.75/31,162.12 = 9,689.19/x
  3. Step 3: Cross multiply
    20,774.75x = 31,162.12 × 9,689.19
  4. Step 4: Simplify right side
    20,774.75x = 301,935,560.40
  5. Step 5: Solve for x
    x = 301,935,560.40/20,774.75
  6. Step 6: Final answer
    x = 14,533.78

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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.