Home / 21,577.05-29,775.60-12,143.79

Finding the Fourth Proportional to 21,577.05, 29,775.60 and 12,143.79

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Solution

The fourth proportional to 21,577.05, 29,775.60 and 12,143.79 is: 16,758.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,577.05 : 29,775.60 = 12,143.79 : x
  2. Step 2: Convert to fraction form
    21,577.05/29,775.60 = 12,143.79/x
  3. Step 3: Cross multiply
    21,577.05x = 29,775.60 × 12,143.79
  4. Step 4: Simplify right side
    21,577.05x = 361,588,633.52
  5. Step 5: Solve for x
    x = 361,588,633.52/21,577.05
  6. Step 6: Final answer
    x = 16,758.02

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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.