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Finding the Fourth Proportional to 18,999.74, 28,497.18 and 7,904.36

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Solution

The fourth proportional to 18,999.74, 28,497.18 and 7,904.36 is: 11,855.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.74 : 28,497.18 = 7,904.36 : x
  2. Step 2: Convert to fraction form
    18,999.74/28,497.18 = 7,904.36/x
  3. Step 3: Cross multiply
    18,999.74x = 28,497.18 × 7,904.36
  4. Step 4: Simplify right side
    18,999.74x = 225,251,969.70
  5. Step 5: Solve for x
    x = 225,251,969.70/18,999.74
  6. Step 6: Final answer
    x = 11,855.53

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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.