Home / 19,821.24-27,381.78-15,837.12

Finding the Fourth Proportional to 19,821.24, 27,381.78 and 15,837.12

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Solution

The fourth proportional to 19,821.24, 27,381.78 and 15,837.12 is: 21,877.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,821.24 : 27,381.78 = 15,837.12 : x
  2. Step 2: Convert to fraction form
    19,821.24/27,381.78 = 15,837.12/x
  3. Step 3: Cross multiply
    19,821.24x = 27,381.78 × 15,837.12
  4. Step 4: Simplify right side
    19,821.24x = 433,648,535.67
  5. Step 5: Solve for x
    x = 433,648,535.67/19,821.24
  6. Step 6: Final answer
    x = 21,877.97

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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.