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Finding the Fourth Proportional to 14,993.05, 20,689.51 and 8,278.51

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Solution

The fourth proportional to 14,993.05, 20,689.51 and 8,278.51 is: 11,423.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,993.05 : 20,689.51 = 8,278.51 : x
  2. Step 2: Convert to fraction form
    14,993.05/20,689.51 = 8,278.51/x
  3. Step 3: Cross multiply
    14,993.05x = 20,689.51 × 8,278.51
  4. Step 4: Simplify right side
    14,993.05x = 171,278,315.43
  5. Step 5: Solve for x
    x = 171,278,315.43/14,993.05
  6. Step 6: Final answer
    x = 11,423.85

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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.