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Finding the Fourth Proportional to 18,724.65, 28,090.95 and 7,037.97

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Solution

The fourth proportional to 18,724.65, 28,090.95 and 7,037.97 is: 10,558.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724.65 : 28,090.95 = 7,037.97 : x
  2. Step 2: Convert to fraction form
    18,724.65/28,090.95 = 7,037.97/x
  3. Step 3: Cross multiply
    18,724.65x = 28,090.95 × 7,037.97
  4. Step 4: Simplify right side
    18,724.65x = 197,703,263.37
  5. Step 5: Solve for x
    x = 197,703,263.37/18,724.65
  6. Step 6: Final answer
    x = 10,558.45

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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.