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Finding the Fourth Proportional to 39,886.96, 59,832.72 and 20,142.40

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Solution

The fourth proportional to 39,886.96, 59,832.72 and 20,142.40 is: 30,214.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,886.96 : 59,832.72 = 20,142.40 : x
  2. Step 2: Convert to fraction form
    39,886.96/59,832.72 = 20,142.40/x
  3. Step 3: Cross multiply
    39,886.96x = 59,832.72 × 20,142.40
  4. Step 4: Simplify right side
    39,886.96x = 1,205,174,579.33
  5. Step 5: Solve for x
    x = 1,205,174,579.33/39,886.96
  6. Step 6: Final answer
    x = 30,214.75

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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.