Home / 21,868.36-30,170.76-12,306.31

Finding the Fourth Proportional to 21,868.36, 30,170.76 and 12,306.31

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Solution

The fourth proportional to 21,868.36, 30,170.76 and 12,306.31 is: 16,978.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.36 : 30,170.76 = 12,306.31 : x
  2. Step 2: Convert to fraction form
    21,868.36/30,170.76 = 12,306.31/x
  3. Step 3: Cross multiply
    21,868.36x = 30,170.76 × 12,306.31
  4. Step 4: Simplify right side
    21,868.36x = 371,290,725.50
  5. Step 5: Solve for x
    x = 371,290,725.50/21,868.36
  6. Step 6: Final answer
    x = 16,978.44

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1.5x scale

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.