Home / 7,845.05-10,815.66-6,721.16

Finding the Fourth Proportional to 7,845.05, 10,815.66 and 6,721.16

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Solution

The fourth proportional to 7,845.05, 10,815.66 and 6,721.16 is: 9,266.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,845.05 : 10,815.66 = 6,721.16 : x
  2. Step 2: Convert to fraction form
    7,845.05/10,815.66 = 6,721.16/x
  3. Step 3: Cross multiply
    7,845.05x = 10,815.66 × 6,721.16
  4. Step 4: Simplify right side
    7,845.05x = 72,693,781.37
  5. Step 5: Solve for x
    x = 72,693,781.37/7,845.05
  6. Step 6: Final answer
    x = 9,266.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.