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Finding the Fourth Proportional to 28,406.65, 42,606.03 and 15,073.81

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Solution

The fourth proportional to 28,406.65, 42,606.03 and 15,073.81 is: 22,608.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,406.65 : 42,606.03 = 15,073.81 : x
  2. Step 2: Convert to fraction form
    28,406.65/42,606.03 = 15,073.81/x
  3. Step 3: Cross multiply
    28,406.65x = 42,606.03 × 15,073.81
  4. Step 4: Simplify right side
    28,406.65x = 642,235,201.07
  5. Step 5: Solve for x
    x = 642,235,201.07/28,406.65
  6. Step 6: Final answer
    x = 22,608.62

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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.