Home / 7,821.81-10,795.34-5,140.80

Finding the Fourth Proportional to 7,821.81, 10,795.34 and 5,140.80

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Solution

The fourth proportional to 7,821.81, 10,795.34 and 5,140.80 is: 7,095.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.81 : 10,795.34 = 5,140.80 : x
  2. Step 2: Convert to fraction form
    7,821.81/10,795.34 = 5,140.80/x
  3. Step 3: Cross multiply
    7,821.81x = 10,795.34 × 5,140.80
  4. Step 4: Simplify right side
    7,821.81x = 55,496,658.17
  5. Step 5: Solve for x
    x = 55,496,658.17/7,821.81
  6. Step 6: Final answer
    x = 7,095.12

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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.