Home / 7,146.78-10,720.66-2,215.77

Finding the Fourth Proportional to 7,146.78, 10,720.66 and 2,215.77

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Solution

The fourth proportional to 7,146.78, 10,720.66 and 2,215.77 is: 3,323.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,146.78 : 10,720.66 = 2,215.77 : x
  2. Step 2: Convert to fraction form
    7,146.78/10,720.66 = 2,215.77/x
  3. Step 3: Cross multiply
    7,146.78x = 10,720.66 × 2,215.77
  4. Step 4: Simplify right side
    7,146.78x = 23,754,516.81
  5. Step 5: Solve for x
    x = 23,754,516.81/7,146.78
  6. Step 6: Final answer
    x = 3,323.81

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1.5x scale

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.