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Finding the Fourth Proportional to 18,445.32, 27,646.92 and 7,912.08

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Solution

The fourth proportional to 18,445.32, 27,646.92 and 7,912.08 is: 11,859.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,445.32 : 27,646.92 = 7,912.08 : x
  2. Step 2: Convert to fraction form
    18,445.32/27,646.92 = 7,912.08/x
  3. Step 3: Cross multiply
    18,445.32x = 27,646.92 × 7,912.08
  4. Step 4: Simplify right side
    18,445.32x = 218,744,642.79
  5. Step 5: Solve for x
    x = 218,744,642.79/18,445.32
  6. Step 6: Final answer
    x = 11,859.09

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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.