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Finding the Fourth Proportional to 18,657.90, 27,987.09 and 5,510.46

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Solution

The fourth proportional to 18,657.90, 27,987.09 and 5,510.46 is: 8,265.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,657.90 : 27,987.09 = 5,510.46 : x
  2. Step 2: Convert to fraction form
    18,657.90/27,987.09 = 5,510.46/x
  3. Step 3: Cross multiply
    18,657.90x = 27,987.09 × 5,510.46
  4. Step 4: Simplify right side
    18,657.90x = 154,221,739.96
  5. Step 5: Solve for x
    x = 154,221,739.96/18,657.90
  6. Step 6: Final answer
    x = 8,265.76

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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.