Home / 19,855.24-27,428.70-15,871.12

Finding the Fourth Proportional to 19,855.24, 27,428.70 and 15,871.12

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Solution

The fourth proportional to 19,855.24, 27,428.70 and 15,871.12 is: 21,924.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,855.24 : 27,428.70 = 15,871.12 : x
  2. Step 2: Convert to fraction form
    19,855.24/27,428.70 = 15,871.12/x
  3. Step 3: Cross multiply
    19,855.24x = 27,428.70 × 15,871.12
  4. Step 4: Simplify right side
    19,855.24x = 435,324,189.14
  5. Step 5: Solve for x
    x = 435,324,189.14/19,855.24
  6. Step 6: Final answer
    x = 21,924.90

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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.