Home / 21,281.28-31,923.36-7,235.52

Finding the Fourth Proportional to 21,281.28, 31,923.36 and 7,235.52

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Solution

The fourth proportional to 21,281.28, 31,923.36 and 7,235.52 is: 10,853.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.28 : 31,923.36 = 7,235.52 : x
  2. Step 2: Convert to fraction form
    21,281.28/31,923.36 = 7,235.52/x
  3. Step 3: Cross multiply
    21,281.28x = 31,923.36 × 7,235.52
  4. Step 4: Simplify right side
    21,281.28x = 230,982,109.75
  5. Step 5: Solve for x
    x = 230,982,109.75/21,281.28
  6. Step 6: Final answer
    x = 10,853.77

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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.