Home / 21,171-31,862.85-15,933.15

Finding the Fourth Proportional to 21,171, 31,862.85 and 15,933.15

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Solution

The fourth proportional to 21,171, 31,862.85 and 15,933.15 is: 23,979.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171 : 31,862.85 = 15,933.15 : x
  2. Step 2: Convert to fraction form
    21,171/31,862.85 = 15,933.15/x
  3. Step 3: Cross multiply
    21,171x = 31,862.85 × 15,933.15
  4. Step 4: Simplify right side
    21,171x = 507,675,568.48
  5. Step 5: Solve for x
    x = 507,675,568.48/21,171
  6. Step 6: Final answer
    x = 23,979.76

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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.