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Finding the Fourth Proportional to 15,202,346.68, 20,978,979.24 and 8,232,967.69

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Solution

The fourth proportional to 15,202,346.68, 20,978,979.24 and 8,232,967.69 is: 11,361,355.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,202,346.68 : 20,978,979.24 = 8,232,967.69 : x
  2. Step 2: Convert to fraction form
    15,202,346.68/20,978,979.24 = 8,232,967.69/x
  3. Step 3: Cross multiply
    15,202,346.68x = 20,978,979.24 × 8,232,967.69
  4. Step 4: Simplify right side
    15,202,346.68x = 172,719,258,252,100.75
  5. Step 5: Solve for x
    x = 172,719,258,252,100.75/15,202,346.68
  6. Step 6: Final answer
    x = 11,361,355.05

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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.