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Finding the Fourth Proportional to 19,959.20, 27,555.72 and 17,745.20

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Solution

The fourth proportional to 19,959.20, 27,555.72 and 17,745.20 is: 24,499.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,959.20 : 27,555.72 = 17,745.20 : x
  2. Step 2: Convert to fraction form
    19,959.20/27,555.72 = 17,745.20/x
  3. Step 3: Cross multiply
    19,959.20x = 27,555.72 × 17,745.20
  4. Step 4: Simplify right side
    19,959.20x = 488,981,762.54
  5. Step 5: Solve for x
    x = 488,981,762.54/19,959.20
  6. Step 6: Final answer
    x = 24,499.07

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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.