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Finding the Fourth Proportional to 39,672.48, 59,518.72 and 28,008.48

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Solution

The fourth proportional to 39,672.48, 59,518.72 and 28,008.48 is: 42,019.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,672.48 : 59,518.72 = 28,008.48 : x
  2. Step 2: Convert to fraction form
    39,672.48/59,518.72 = 28,008.48/x
  3. Step 3: Cross multiply
    39,672.48x = 59,518.72 × 28,008.48
  4. Step 4: Simplify right side
    39,672.48x = 1,667,028,878.75
  5. Step 5: Solve for x
    x = 1,667,028,878.75/39,672.48
  6. Step 6: Final answer
    x = 42,019.78

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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.