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Finding the Fourth Proportional to 25,690.86, 38,531.43 and 8,160.84

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Solution

The fourth proportional to 25,690.86, 38,531.43 and 8,160.84 is: 12,239.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,690.86 : 38,531.43 = 8,160.84 : x
  2. Step 2: Convert to fraction form
    25,690.86/38,531.43 = 8,160.84/x
  3. Step 3: Cross multiply
    25,690.86x = 38,531.43 × 8,160.84
  4. Step 4: Simplify right side
    25,690.86x = 314,448,835.20
  5. Step 5: Solve for x
    x = 314,448,835.20/25,690.86
  6. Step 6: Final answer
    x = 12,239.72

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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.