Home / 7,140.75-10,718.05-3,445.58

Finding the Fourth Proportional to 7,140.75, 10,718.05 and 3,445.58

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Solution

The fourth proportional to 7,140.75, 10,718.05 and 3,445.58 is: 5,171.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.75 : 10,718.05 = 3,445.58 : x
  2. Step 2: Convert to fraction form
    7,140.75/10,718.05 = 3,445.58/x
  3. Step 3: Cross multiply
    7,140.75x = 10,718.05 × 3,445.58
  4. Step 4: Simplify right side
    7,140.75x = 36,929,845.13
  5. Step 5: Solve for x
    x = 36,929,845.13/7,140.75
  6. Step 6: Final answer
    x = 5,171.70

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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.