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Finding the Fourth Proportional to 21,873, 30,184.90 and 11,937

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Solution

The fourth proportional to 21,873, 30,184.90 and 11,937 is: 16,473.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873 : 30,184.90 = 11,937 : x
  2. Step 2: Convert to fraction form
    21,873/30,184.90 = 11,937/x
  3. Step 3: Cross multiply
    21,873x = 30,184.90 × 11,937
  4. Step 4: Simplify right side
    21,873x = 360,317,151.30
  5. Step 5: Solve for x
    x = 360,317,151.30/21,873
  6. Step 6: Final answer
    x = 16,473.15

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Double scale
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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.