Home / 10,221.90-15,320-4,371.62

Finding the Fourth Proportional to 10,221.90, 15,320 and 4,371.62

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Solution

The fourth proportional to 10,221.90, 15,320 and 4,371.62 is: 6,551.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.90 : 15,320 = 4,371.62 : x
  2. Step 2: Convert to fraction form
    10,221.90/15,320 = 4,371.62/x
  3. Step 3: Cross multiply
    10,221.90x = 15,320 × 4,371.62
  4. Step 4: Simplify right side
    10,221.90x = 66,973,218.40
  5. Step 5: Solve for x
    x = 66,973,218.40/10,221.90
  6. Step 6: Final answer
    x = 6,551.93

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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.