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Finding the Fourth Proportional to 18,918.62, 28,395.42 and 9,565.22

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Solution

The fourth proportional to 18,918.62, 28,395.42 and 9,565.22 is: 14,356.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.62 : 28,395.42 = 9,565.22 : x
  2. Step 2: Convert to fraction form
    18,918.62/28,395.42 = 9,565.22/x
  3. Step 3: Cross multiply
    18,918.62x = 28,395.42 × 9,565.22
  4. Step 4: Simplify right side
    18,918.62x = 271,608,439.29
  5. Step 5: Solve for x
    x = 271,608,439.29/18,918.62
  6. Step 6: Final answer
    x = 14,356.67

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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.