Home / 21,151.38-31,727.58-7,111.59

Finding the Fourth Proportional to 21,151.38, 31,727.58 and 7,111.59

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Solution

The fourth proportional to 21,151.38, 31,727.58 and 7,111.59 is: 10,667.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.38 : 31,727.58 = 7,111.59 : x
  2. Step 2: Convert to fraction form
    21,151.38/31,727.58 = 7,111.59/x
  3. Step 3: Cross multiply
    21,151.38x = 31,727.58 × 7,111.59
  4. Step 4: Simplify right side
    21,151.38x = 225,633,346.46
  5. Step 5: Solve for x
    x = 225,633,346.46/21,151.38
  6. Step 6: Final answer
    x = 10,667.55

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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.