Home / 28,439.11-42,653.80-7,657.75

Finding the Fourth Proportional to 28,439.11, 42,653.80 and 7,657.75

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Solution

The fourth proportional to 28,439.11, 42,653.80 and 7,657.75 is: 11,485.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.11 : 42,653.80 = 7,657.75 : x
  2. Step 2: Convert to fraction form
    28,439.11/42,653.80 = 7,657.75/x
  3. Step 3: Cross multiply
    28,439.11x = 42,653.80 × 7,657.75
  4. Step 4: Simplify right side
    28,439.11x = 326,632,136.95
  5. Step 5: Solve for x
    x = 326,632,136.95/28,439.11
  6. Step 6: Final answer
    x = 11,485.32

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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.