Home / 13,881.72-20,823.80-6,385.20

Finding the Fourth Proportional to 13,881.72, 20,823.80 and 6,385.20

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Solution

The fourth proportional to 13,881.72, 20,823.80 and 6,385.20 is: 9,578.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,881.72 : 20,823.80 = 6,385.20 : x
  2. Step 2: Convert to fraction form
    13,881.72/20,823.80 = 6,385.20/x
  3. Step 3: Cross multiply
    13,881.72x = 20,823.80 × 6,385.20
  4. Step 4: Simplify right side
    13,881.72x = 132,964,127.76
  5. Step 5: Solve for x
    x = 132,964,127.76/13,881.72
  6. Step 6: Final answer
    x = 9,578.36

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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.