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Finding the Fourth Proportional to 11,015.40, 16,490.70 and 9,719.40

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Solution

The fourth proportional to 11,015.40, 16,490.70 and 9,719.40 is: 14,550.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,015.40 : 16,490.70 = 9,719.40 : x
  2. Step 2: Convert to fraction form
    11,015.40/16,490.70 = 9,719.40/x
  3. Step 3: Cross multiply
    11,015.40x = 16,490.70 × 9,719.40
  4. Step 4: Simplify right side
    11,015.40x = 160,279,709.58
  5. Step 5: Solve for x
    x = 160,279,709.58/11,015.40
  6. Step 6: Final answer
    x = 14,550.51

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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.