Home / 27,721.32-38,242.10-20,155.92

Finding the Fourth Proportional to 27,721.32, 38,242.10 and 20,155.92

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Solution

The fourth proportional to 27,721.32, 38,242.10 and 20,155.92 is: 27,805.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,721.32 : 38,242.10 = 20,155.92 : x
  2. Step 2: Convert to fraction form
    27,721.32/38,242.10 = 20,155.92/x
  3. Step 3: Cross multiply
    27,721.32x = 38,242.10 × 20,155.92
  4. Step 4: Simplify right side
    27,721.32x = 770,804,708.23
  5. Step 5: Solve for x
    x = 770,804,708.23/27,721.32
  6. Step 6: Final answer
    x = 27,805.48

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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.