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Finding the Fourth Proportional to 27,883.92, 38,479.80 and 15,308.64

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Solution

The fourth proportional to 27,883.92, 38,479.80 and 15,308.64 is: 21,125.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,883.92 : 38,479.80 = 15,308.64 : x
  2. Step 2: Convert to fraction form
    27,883.92/38,479.80 = 15,308.64/x
  3. Step 3: Cross multiply
    27,883.92x = 38,479.80 × 15,308.64
  4. Step 4: Simplify right side
    27,883.92x = 589,073,405.47
  5. Step 5: Solve for x
    x = 589,073,405.47/27,883.92
  6. Step 6: Final answer
    x = 21,125.92

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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.