Home / 21,281.70-31,913.28-7,237.92

Finding the Fourth Proportional to 21,281.70, 31,913.28 and 7,237.92

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Solution

The fourth proportional to 21,281.70, 31,913.28 and 7,237.92 is: 10,853.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.70 : 31,913.28 = 7,237.92 : x
  2. Step 2: Convert to fraction form
    21,281.70/31,913.28 = 7,237.92/x
  3. Step 3: Cross multiply
    21,281.70x = 31,913.28 × 7,237.92
  4. Step 4: Simplify right side
    21,281.70x = 230,985,767.58
  5. Step 5: Solve for x
    x = 230,985,767.58/21,281.70
  6. Step 6: Final answer
    x = 10,853.73

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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.