Home / 21,122.05-29,160.57-15,773.98

Finding the Fourth Proportional to 21,122.05, 29,160.57 and 15,773.98

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Solution

The fourth proportional to 21,122.05, 29,160.57 and 15,773.98 is: 21,777.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.05 : 29,160.57 = 15,773.98 : x
  2. Step 2: Convert to fraction form
    21,122.05/29,160.57 = 15,773.98/x
  3. Step 3: Cross multiply
    21,122.05x = 29,160.57 × 15,773.98
  4. Step 4: Simplify right side
    21,122.05x = 459,978,023.30
  5. Step 5: Solve for x
    x = 459,978,023.30/21,122.05
  6. Step 6: Final answer
    x = 21,777.15

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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.