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Finding the Fourth Proportional to 10,891.87, 16,335.84 and 2,886.69

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Solution

The fourth proportional to 10,891.87, 16,335.84 and 2,886.69 is: 4,329.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,891.87 : 16,335.84 = 2,886.69 : x
  2. Step 2: Convert to fraction form
    10,891.87/16,335.84 = 2,886.69/x
  3. Step 3: Cross multiply
    10,891.87x = 16,335.84 × 2,886.69
  4. Step 4: Simplify right side
    10,891.87x = 47,156,461.81
  5. Step 5: Solve for x
    x = 47,156,461.81/10,891.87
  6. Step 6: Final answer
    x = 4,329.51

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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.