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Finding the Fourth Proportional to 39,991.56, 59,901.08 and 18,899.77

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Solution

The fourth proportional to 39,991.56, 59,901.08 and 18,899.77 is: 28,308.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,991.56 : 59,901.08 = 18,899.77 : x
  2. Step 2: Convert to fraction form
    39,991.56/59,901.08 = 18,899.77/x
  3. Step 3: Cross multiply
    39,991.56x = 59,901.08 × 18,899.77
  4. Step 4: Simplify right side
    39,991.56x = 1,132,116,390.50
  5. Step 5: Solve for x
    x = 1,132,116,390.50/39,991.56
  6. Step 6: Final answer
    x = 28,308.88

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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.