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Finding the Fourth Proportional to 18,655.52, 27,986.31 and 5,509.22

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Solution

The fourth proportional to 18,655.52, 27,986.31 and 5,509.22 is: 8,264.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.52 : 27,986.31 = 5,509.22 : x
  2. Step 2: Convert to fraction form
    18,655.52/27,986.31 = 5,509.22/x
  3. Step 3: Cross multiply
    18,655.52x = 27,986.31 × 5,509.22
  4. Step 4: Simplify right side
    18,655.52x = 154,182,738.78
  5. Step 5: Solve for x
    x = 154,182,738.78/18,655.52
  6. Step 6: Final answer
    x = 8,264.72

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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.