Home / 19,887.31-29,950.18-18,115.84

Finding the Fourth Proportional to 19,887.31, 29,950.18 and 18,115.84

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Solution

The fourth proportional to 19,887.31, 29,950.18 and 18,115.84 is: 27,282.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,887.31 : 29,950.18 = 18,115.84 : x
  2. Step 2: Convert to fraction form
    19,887.31/29,950.18 = 18,115.84/x
  3. Step 3: Cross multiply
    19,887.31x = 29,950.18 × 18,115.84
  4. Step 4: Simplify right side
    19,887.31x = 542,572,668.85
  5. Step 5: Solve for x
    x = 542,572,668.85/19,887.31
  6. Step 6: Final answer
    x = 27,282.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.