Home / 28,456.52-42,683.70-7,680.56

Finding the Fourth Proportional to 28,456.52, 42,683.70 and 7,680.56

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Solution

The fourth proportional to 28,456.52, 42,683.70 and 7,680.56 is: 11,520.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,456.52 : 42,683.70 = 7,680.56 : x
  2. Step 2: Convert to fraction form
    28,456.52/42,683.70 = 7,680.56/x
  3. Step 3: Cross multiply
    28,456.52x = 42,683.70 × 7,680.56
  4. Step 4: Simplify right side
    28,456.52x = 327,834,718.87
  5. Step 5: Solve for x
    x = 327,834,718.87/28,456.52
  6. Step 6: Final answer
    x = 11,520.55

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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.