Home / 21,905.10-30,229.88-12,348.79

Finding the Fourth Proportional to 21,905.10, 30,229.88 and 12,348.79

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Solution

The fourth proportional to 21,905.10, 30,229.88 and 12,348.79 is: 17,041.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.10 : 30,229.88 = 12,348.79 : x
  2. Step 2: Convert to fraction form
    21,905.10/30,229.88 = 12,348.79/x
  3. Step 3: Cross multiply
    21,905.10x = 30,229.88 × 12,348.79
  4. Step 4: Simplify right side
    21,905.10x = 373,302,302.53
  5. Step 5: Solve for x
    x = 373,302,302.53/21,905.10
  6. Step 6: Final answer
    x = 17,041.80

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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.