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Finding the Fourth Proportional to 18,998.46, 28,509.93 and 10,239.48

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Solution

The fourth proportional to 18,998.46, 28,509.93 and 10,239.48 is: 15,365.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.46 : 28,509.93 = 10,239.48 : x
  2. Step 2: Convert to fraction form
    18,998.46/28,509.93 = 10,239.48/x
  3. Step 3: Cross multiply
    18,998.46x = 28,509.93 × 10,239.48
  4. Step 4: Simplify right side
    18,998.46x = 291,926,858.04
  5. Step 5: Solve for x
    x = 291,926,858.04/18,998.46
  6. Step 6: Final answer
    x = 15,365.82

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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.