Home / 21,610.40-29,820.60-12,177.20

Finding the Fourth Proportional to 21,610.40, 29,820.60 and 12,177.20

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Solution

The fourth proportional to 21,610.40, 29,820.60 and 12,177.20 is: 16,803.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,610.40 : 29,820.60 = 12,177.20 : x
  2. Step 2: Convert to fraction form
    21,610.40/29,820.60 = 12,177.20/x
  3. Step 3: Cross multiply
    21,610.40x = 29,820.60 × 12,177.20
  4. Step 4: Simplify right side
    21,610.40x = 363,131,410.32
  5. Step 5: Solve for x
    x = 363,131,410.32/21,610.40
  6. Step 6: Final answer
    x = 16,803.55

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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.