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Finding the Fourth Proportional to 15,141.41, 20,890.43 and 8,591.82

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Solution

The fourth proportional to 15,141.41, 20,890.43 and 8,591.82 is: 11,854.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,141.41 : 20,890.43 = 8,591.82 : x
  2. Step 2: Convert to fraction form
    15,141.41/20,890.43 = 8,591.82/x
  3. Step 3: Cross multiply
    15,141.41x = 20,890.43 × 8,591.82
  4. Step 4: Simplify right side
    15,141.41x = 179,486,925.63
  5. Step 5: Solve for x
    x = 179,486,925.63/15,141.41
  6. Step 6: Final answer
    x = 11,854.05

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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.