Home / 27,790.68-38,354.78-15,851.28

Finding the Fourth Proportional to 27,790.68, 38,354.78 and 15,851.28

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Solution

The fourth proportional to 27,790.68, 38,354.78 and 15,851.28 is: 21,876.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,790.68 : 38,354.78 = 15,851.28 : x
  2. Step 2: Convert to fraction form
    27,790.68/38,354.78 = 15,851.28/x
  3. Step 3: Cross multiply
    27,790.68x = 38,354.78 × 15,851.28
  4. Step 4: Simplify right side
    27,790.68x = 607,972,357.12
  5. Step 5: Solve for x
    x = 607,972,357.12/27,790.68
  6. Step 6: Final answer
    x = 21,876.84

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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.