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Finding the Fourth Proportional to 18,859.62, 28,282.80 and 5,528.94

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Solution

The fourth proportional to 18,859.62, 28,282.80 and 5,528.94 is: 8,291.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.62 : 28,282.80 = 5,528.94 : x
  2. Step 2: Convert to fraction form
    18,859.62/28,282.80 = 5,528.94/x
  3. Step 3: Cross multiply
    18,859.62x = 28,282.80 × 5,528.94
  4. Step 4: Simplify right side
    18,859.62x = 156,373,904.23
  5. Step 5: Solve for x
    x = 156,373,904.23/18,859.62
  6. Step 6: Final answer
    x = 8,291.47

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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.