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Finding the Fourth Proportional to 25,641.42, 38,467.80 and 8,111.40

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Solution

The fourth proportional to 25,641.42, 38,467.80 and 8,111.40 is: 12,168.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,641.42 : 38,467.80 = 8,111.40 : x
  2. Step 2: Convert to fraction form
    25,641.42/38,467.80 = 8,111.40/x
  3. Step 3: Cross multiply
    25,641.42x = 38,467.80 × 8,111.40
  4. Step 4: Simplify right side
    25,641.42x = 312,027,712.92
  5. Step 5: Solve for x
    x = 312,027,712.92/25,641.42
  6. Step 6: Final answer
    x = 12,168.89

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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.