Home / 27,981.65-38,616.10-15,882.98

Finding the Fourth Proportional to 27,981.65, 38,616.10 and 15,882.98

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Solution

The fourth proportional to 27,981.65, 38,616.10 and 15,882.98 is: 21,919.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.65 : 38,616.10 = 15,882.98 : x
  2. Step 2: Convert to fraction form
    27,981.65/38,616.10 = 15,882.98/x
  3. Step 3: Cross multiply
    27,981.65x = 38,616.10 × 15,882.98
  4. Step 4: Simplify right side
    27,981.65x = 613,338,800.81
  5. Step 5: Solve for x
    x = 613,338,800.81/27,981.65
  6. Step 6: Final answer
    x = 21,919.33

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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.