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Finding the Fourth Proportional to 18,995.68, 28,500.72 and 7,899.52

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Solution

The fourth proportional to 18,995.68, 28,500.72 and 7,899.52 is: 11,852.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.68 : 28,500.72 = 7,899.52 : x
  2. Step 2: Convert to fraction form
    18,995.68/28,500.72 = 7,899.52/x
  3. Step 3: Cross multiply
    18,995.68x = 28,500.72 × 7,899.52
  4. Step 4: Simplify right side
    18,995.68x = 225,142,007.65
  5. Step 5: Solve for x
    x = 225,142,007.65/18,995.68
  6. Step 6: Final answer
    x = 11,852.27

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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.