Home / 10,520.19-15,781.89-4,976.55

Finding the Fourth Proportional to 10,520.19, 15,781.89 and 4,976.55

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Solution

The fourth proportional to 10,520.19, 15,781.89 and 4,976.55 is: 7,465.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,520.19 : 15,781.89 = 4,976.55 : x
  2. Step 2: Convert to fraction form
    10,520.19/15,781.89 = 4,976.55/x
  3. Step 3: Cross multiply
    10,520.19x = 15,781.89 × 4,976.55
  4. Step 4: Simplify right side
    10,520.19x = 78,539,364.68
  5. Step 5: Solve for x
    x = 78,539,364.68/10,520.19
  6. Step 6: Final answer
    x = 7,465.58

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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.