Home / 27,872.40-38,465.28-15,936.72

Finding the Fourth Proportional to 27,872.40, 38,465.28 and 15,936.72

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Solution

The fourth proportional to 27,872.40, 38,465.28 and 15,936.72 is: 21,993.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,872.40 : 38,465.28 = 15,936.72 : x
  2. Step 2: Convert to fraction form
    27,872.40/38,465.28 = 15,936.72/x
  3. Step 3: Cross multiply
    27,872.40x = 38,465.28 × 15,936.72
  4. Step 4: Simplify right side
    27,872.40x = 613,010,397.08
  5. Step 5: Solve for x
    x = 613,010,397.08/27,872.40
  6. Step 6: Final answer
    x = 21,993.46

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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.