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Finding the Fourth Proportional to 28,065.71, 42,098.46 and 7,289.21

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Solution

The fourth proportional to 28,065.71, 42,098.46 and 7,289.21 is: 10,933.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.71 : 42,098.46 = 7,289.21 : x
  2. Step 2: Convert to fraction form
    28,065.71/42,098.46 = 7,289.21/x
  3. Step 3: Cross multiply
    28,065.71x = 42,098.46 × 7,289.21
  4. Step 4: Simplify right side
    28,065.71x = 306,864,515.62
  5. Step 5: Solve for x
    x = 306,864,515.62/28,065.71
  6. Step 6: Final answer
    x = 10,933.79

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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.