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Finding the Fourth Proportional to 14,993.40, 20,690.46 and 8,278.53

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Solution

The fourth proportional to 14,993.40, 20,690.46 and 8,278.53 is: 11,424.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,993.40 : 20,690.46 = 8,278.53 : x
  2. Step 2: Convert to fraction form
    14,993.40/20,690.46 = 8,278.53/x
  3. Step 3: Cross multiply
    14,993.40x = 20,690.46 × 8,278.53
  4. Step 4: Simplify right side
    14,993.40x = 171,286,593.82
  5. Step 5: Solve for x
    x = 171,286,593.82/14,993.40
  6. Step 6: Final answer
    x = 11,424.13

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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.