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Finding the Fourth Proportional to 39,891.56, 59,837.34 and 12,189.32

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Solution

The fourth proportional to 39,891.56, 59,837.34 and 12,189.32 is: 18,283.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,891.56 : 59,837.34 = 12,189.32 : x
  2. Step 2: Convert to fraction form
    39,891.56/59,837.34 = 12,189.32/x
  3. Step 3: Cross multiply
    39,891.56x = 59,837.34 × 12,189.32
  4. Step 4: Simplify right side
    39,891.56x = 729,376,485.21
  5. Step 5: Solve for x
    x = 729,376,485.21/39,891.56
  6. Step 6: Final answer
    x = 18,283.98

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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.