Home / 7,121.36-10,678.40-4,160.82

Finding the Fourth Proportional to 7,121.36, 10,678.40 and 4,160.82

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Solution

The fourth proportional to 7,121.36, 10,678.40 and 4,160.82 is: 6,239.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.36 : 10,678.40 = 4,160.82 : x
  2. Step 2: Convert to fraction form
    7,121.36/10,678.40 = 4,160.82/x
  3. Step 3: Cross multiply
    7,121.36x = 10,678.40 × 4,160.82
  4. Step 4: Simplify right side
    7,121.36x = 44,430,900.29
  5. Step 5: Solve for x
    x = 44,430,900.29/7,121.36
  6. Step 6: Final answer
    x = 6,239.10

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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.