Home / 21,868.12-30,177.06-12,436.60

Finding the Fourth Proportional to 21,868.12, 30,177.06 and 12,436.60

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Solution

The fourth proportional to 21,868.12, 30,177.06 and 12,436.60 is: 17,161.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.12 : 30,177.06 = 12,436.60 : x
  2. Step 2: Convert to fraction form
    21,868.12/30,177.06 = 12,436.60/x
  3. Step 3: Cross multiply
    21,868.12x = 30,177.06 × 12,436.60
  4. Step 4: Simplify right side
    21,868.12x = 375,300,024.40
  5. Step 5: Solve for x
    x = 375,300,024.40/21,868.12
  6. Step 6: Final answer
    x = 17,161.97

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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.