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Finding the Fourth Proportional to 39,433.99, 54,418.87 and 21,528.99

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Solution

The fourth proportional to 39,433.99, 54,418.87 and 21,528.99 is: 29,709.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,433.99 : 54,418.87 = 21,528.99 : x
  2. Step 2: Convert to fraction form
    39,433.99/54,418.87 = 21,528.99/x
  3. Step 3: Cross multiply
    39,433.99x = 54,418.87 × 21,528.99
  4. Step 4: Simplify right side
    39,433.99x = 1,171,583,308.04
  5. Step 5: Solve for x
    x = 1,171,583,308.04/39,433.99
  6. Step 6: Final answer
    x = 29,709.99

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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.