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Finding the Fourth Proportional to 39,774.87, 54,887.84 and 21,868.81

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Solution

The fourth proportional to 39,774.87, 54,887.84 and 21,868.81 is: 30,178.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,774.87 : 54,887.84 = 21,868.81 : x
  2. Step 2: Convert to fraction form
    39,774.87/54,887.84 = 21,868.81/x
  3. Step 3: Cross multiply
    39,774.87x = 54,887.84 × 21,868.81
  4. Step 4: Simplify right side
    39,774.87x = 1,200,331,744.27
  5. Step 5: Solve for x
    x = 1,200,331,744.27/39,774.87
  6. Step 6: Final answer
    x = 30,178.14

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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.