Home / 21,187-31,766.46-10,095.40

Finding the Fourth Proportional to 21,187, 31,766.46 and 10,095.40

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Solution

The fourth proportional to 21,187, 31,766.46 and 10,095.40 is: 15,136.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187 : 31,766.46 = 10,095.40 : x
  2. Step 2: Convert to fraction form
    21,187/31,766.46 = 10,095.40/x
  3. Step 3: Cross multiply
    21,187x = 31,766.46 × 10,095.40
  4. Step 4: Simplify right side
    21,187x = 320,695,120.28
  5. Step 5: Solve for x
    x = 320,695,120.28/21,187
  6. Step 6: Final answer
    x = 15,136.41

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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.