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Finding the Fourth Proportional to 28,015.53, 42,030 and 8,025.30

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Solution

The fourth proportional to 28,015.53, 42,030 and 8,025.30 is: 12,039.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.53 : 42,030 = 8,025.30 : x
  2. Step 2: Convert to fraction form
    28,015.53/42,030 = 8,025.30/x
  3. Step 3: Cross multiply
    28,015.53x = 42,030 × 8,025.30
  4. Step 4: Simplify right side
    28,015.53x = 337,303,359
  5. Step 5: Solve for x
    x = 337,303,359/28,015.53
  6. Step 6: Final answer
    x = 12,039.87

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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.