Home / 21,399.24-29,540.40-13,750.58

Finding the Fourth Proportional to 21,399.24, 29,540.40 and 13,750.58

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Solution

The fourth proportional to 21,399.24, 29,540.40 and 13,750.58 is: 18,981.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.24 : 29,540.40 = 13,750.58 : x
  2. Step 2: Convert to fraction form
    21,399.24/29,540.40 = 13,750.58/x
  3. Step 3: Cross multiply
    21,399.24x = 29,540.40 × 13,750.58
  4. Step 4: Simplify right side
    21,399.24x = 406,197,633.43
  5. Step 5: Solve for x
    x = 406,197,633.43/21,399.24
  6. Step 6: Final answer
    x = 18,981.87

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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.