Home / 21,228.81-31,849.86-8,754.70

Finding the Fourth Proportional to 21,228.81, 31,849.86 and 8,754.70

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Solution

The fourth proportional to 21,228.81, 31,849.86 and 8,754.70 is: 13,134.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.81 : 31,849.86 = 8,754.70 : x
  2. Step 2: Convert to fraction form
    21,228.81/31,849.86 = 8,754.70/x
  3. Step 3: Cross multiply
    21,228.81x = 31,849.86 × 8,754.70
  4. Step 4: Simplify right side
    21,228.81x = 278,835,969.34
  5. Step 5: Solve for x
    x = 278,835,969.34/21,228.81
  6. Step 6: Final answer
    x = 13,134.79

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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.