Home / 27,778.64-38,240.52-21,479.12

Finding the Fourth Proportional to 27,778.64, 38,240.52 and 21,479.12

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Solution

The fourth proportional to 27,778.64, 38,240.52 and 21,479.12 is: 29,568.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,778.64 : 38,240.52 = 21,479.12 : x
  2. Step 2: Convert to fraction form
    27,778.64/38,240.52 = 21,479.12/x
  3. Step 3: Cross multiply
    27,778.64x = 38,240.52 × 21,479.12
  4. Step 4: Simplify right side
    27,778.64x = 821,372,717.94
  5. Step 5: Solve for x
    x = 821,372,717.94/27,778.64
  6. Step 6: Final answer
    x = 29,568.50

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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.