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Finding the Fourth Proportional to 16,918.20, 23,639.40 and 16,918.20

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Solution

The fourth proportional to 16,918.20, 23,639.40 and 16,918.20 is: 23,639.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,918.20 : 23,639.40 = 16,918.20 : x
  2. Step 2: Convert to fraction form
    16,918.20/23,639.40 = 16,918.20/x
  3. Step 3: Cross multiply
    16,918.20x = 23,639.40 × 16,918.20
  4. Step 4: Simplify right side
    16,918.20x = 399,936,097.08
  5. Step 5: Solve for x
    x = 399,936,097.08/16,918.20
  6. Step 6: Final answer
    x = 23,639.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.