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Finding the Fourth Proportional to 39,908.70, 59,871.15 and 18,848.70

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Solution

The fourth proportional to 39,908.70, 59,871.15 and 18,848.70 is: 28,276.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,908.70 : 59,871.15 = 18,848.70 : x
  2. Step 2: Convert to fraction form
    39,908.70/59,871.15 = 18,848.70/x
  3. Step 3: Cross multiply
    39,908.70x = 59,871.15 × 18,848.70
  4. Step 4: Simplify right side
    39,908.70x = 1,128,493,345.01
  5. Step 5: Solve for x
    x = 1,128,493,345.01/39,908.70
  6. Step 6: Final answer
    x = 28,276.88

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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.