Home / 21,089.79-29,101.75-12,135.56

Finding the Fourth Proportional to 21,089.79, 29,101.75 and 12,135.56

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Solution

The fourth proportional to 21,089.79, 29,101.75 and 12,135.56 is: 16,745.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.79 : 29,101.75 = 12,135.56 : x
  2. Step 2: Convert to fraction form
    21,089.79/29,101.75 = 12,135.56/x
  3. Step 3: Cross multiply
    21,089.79x = 29,101.75 × 12,135.56
  4. Step 4: Simplify right side
    21,089.79x = 353,165,857.38
  5. Step 5: Solve for x
    x = 353,165,857.38/21,089.79
  6. Step 6: Final answer
    x = 16,745.82

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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.