Home / 7,840.90-10,821.01-5,183.70

Finding the Fourth Proportional to 7,840.90, 10,821.01 and 5,183.70

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Solution

The fourth proportional to 7,840.90, 10,821.01 and 5,183.70 is: 7,153.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,840.90 : 10,821.01 = 5,183.70 : x
  2. Step 2: Convert to fraction form
    7,840.90/10,821.01 = 5,183.70/x
  3. Step 3: Cross multiply
    7,840.90x = 10,821.01 × 5,183.70
  4. Step 4: Simplify right side
    7,840.90x = 56,092,869.54
  5. Step 5: Solve for x
    x = 56,092,869.54/7,840.90
  6. Step 6: Final answer
    x = 7,153.88

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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.