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Finding the Fourth Proportional to 18,385.99, 27,579.08 and 5,238.47

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Solution

The fourth proportional to 18,385.99, 27,579.08 and 5,238.47 is: 7,857.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,385.99 : 27,579.08 = 5,238.47 : x
  2. Step 2: Convert to fraction form
    18,385.99/27,579.08 = 5,238.47/x
  3. Step 3: Cross multiply
    18,385.99x = 27,579.08 × 5,238.47
  4. Step 4: Simplify right side
    18,385.99x = 144,472,265.25
  5. Step 5: Solve for x
    x = 144,472,265.25/18,385.99
  6. Step 6: Final answer
    x = 7,857.74

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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.