Home / 21,866.22-30,172.50-12,306.60

Finding the Fourth Proportional to 21,866.22, 30,172.50 and 12,306.60

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Solution

The fourth proportional to 21,866.22, 30,172.50 and 12,306.60 is: 16,981.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.22 : 30,172.50 = 12,306.60 : x
  2. Step 2: Convert to fraction form
    21,866.22/30,172.50 = 12,306.60/x
  3. Step 3: Cross multiply
    21,866.22x = 30,172.50 × 12,306.60
  4. Step 4: Simplify right side
    21,866.22x = 371,320,888.50
  5. Step 5: Solve for x
    x = 371,320,888.50/21,866.22
  6. Step 6: Final answer
    x = 16,981.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.