Home / 27,981.61-38,617.92-15,719.04

Finding the Fourth Proportional to 27,981.61, 38,617.92 and 15,719.04

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Solution

The fourth proportional to 27,981.61, 38,617.92 and 15,719.04 is: 21,694.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.61 : 38,617.92 = 15,719.04 : x
  2. Step 2: Convert to fraction form
    27,981.61/38,617.92 = 15,719.04/x
  3. Step 3: Cross multiply
    27,981.61x = 38,617.92 × 15,719.04
  4. Step 4: Simplify right side
    27,981.61x = 607,036,629.20
  5. Step 5: Solve for x
    x = 607,036,629.20/27,981.61
  6. Step 6: Final answer
    x = 21,694.13

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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.