Home / 21,015.38-31,527.75-9,171.07

Finding the Fourth Proportional to 21,015.38, 31,527.75 and 9,171.07

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Solution

The fourth proportional to 21,015.38, 31,527.75 and 9,171.07 is: 13,758.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.38 : 31,527.75 = 9,171.07 : x
  2. Step 2: Convert to fraction form
    21,015.38/31,527.75 = 9,171.07/x
  3. Step 3: Cross multiply
    21,015.38x = 31,527.75 × 9,171.07
  4. Step 4: Simplify right side
    21,015.38x = 289,143,202.19
  5. Step 5: Solve for x
    x = 289,143,202.19/21,015.38
  6. Step 6: Final answer
    x = 13,758.65

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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.