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Finding the Fourth Proportional to 39,690.80, 54,769.14 and 22,699.48

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Solution

The fourth proportional to 39,690.80, 54,769.14 and 22,699.48 is: 31,322.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,690.80 : 54,769.14 = 22,699.48 : x
  2. Step 2: Convert to fraction form
    39,690.80/54,769.14 = 22,699.48/x
  3. Step 3: Cross multiply
    39,690.80x = 54,769.14 × 22,699.48
  4. Step 4: Simplify right side
    39,690.80x = 1,243,230,998.05
  5. Step 5: Solve for x
    x = 1,243,230,998.05/39,690.80
  6. Step 6: Final answer
    x = 31,322.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.