Home / 20,849.70-31,289.18-9,171.12

Finding the Fourth Proportional to 20,849.70, 31,289.18 and 9,171.12

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Solution

The fourth proportional to 20,849.70, 31,289.18 and 9,171.12 is: 13,763.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,849.70 : 31,289.18 = 9,171.12 : x
  2. Step 2: Convert to fraction form
    20,849.70/31,289.18 = 9,171.12/x
  3. Step 3: Cross multiply
    20,849.70x = 31,289.18 × 9,171.12
  4. Step 4: Simplify right side
    20,849.70x = 286,956,778.63
  5. Step 5: Solve for x
    x = 286,956,778.63/20,849.70
  6. Step 6: Final answer
    x = 13,763.11

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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.