Home / 21,321.63-31,990.75-8,838.52

Finding the Fourth Proportional to 21,321.63, 31,990.75 and 8,838.52

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Solution

The fourth proportional to 21,321.63, 31,990.75 and 8,838.52 is: 13,261.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.63 : 31,990.75 = 8,838.52 : x
  2. Step 2: Convert to fraction form
    21,321.63/31,990.75 = 8,838.52/x
  3. Step 3: Cross multiply
    21,321.63x = 31,990.75 × 8,838.52
  4. Step 4: Simplify right side
    21,321.63x = 282,750,781.62
  5. Step 5: Solve for x
    x = 282,750,781.62/21,321.63
  6. Step 6: Final answer
    x = 13,261.22

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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.