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Finding the Fourth Proportional to 25,979.43, 38,963.52 and 8,211.51

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Solution

The fourth proportional to 25,979.43, 38,963.52 and 8,211.51 is: 12,315.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,979.43 : 38,963.52 = 8,211.51 : x
  2. Step 2: Convert to fraction form
    25,979.43/38,963.52 = 8,211.51/x
  3. Step 3: Cross multiply
    25,979.43x = 38,963.52 × 8,211.51
  4. Step 4: Simplify right side
    25,979.43x = 319,949,334.12
  5. Step 5: Solve for x
    x = 319,949,334.12/25,979.43
  6. Step 6: Final answer
    x = 12,315.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.