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Finding the Fourth Proportional to 19,940.40, 29,873.70 and 11,624.40

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Solution

The fourth proportional to 19,940.40, 29,873.70 and 11,624.40 is: 17,415.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,940.40 : 29,873.70 = 11,624.40 : x
  2. Step 2: Convert to fraction form
    19,940.40/29,873.70 = 11,624.40/x
  3. Step 3: Cross multiply
    19,940.40x = 29,873.70 × 11,624.40
  4. Step 4: Simplify right side
    19,940.40x = 347,263,838.28
  5. Step 5: Solve for x
    x = 347,263,838.28/19,940.40
  6. Step 6: Final answer
    x = 17,415.09

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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.