Home / 8,064.64-11,122.80-7,121.44

Finding the Fourth Proportional to 8,064.64, 11,122.80 and 7,121.44

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Solution

The fourth proportional to 8,064.64, 11,122.80 and 7,121.44 is: 9,821.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,064.64 : 11,122.80 = 7,121.44 : x
  2. Step 2: Convert to fraction form
    8,064.64/11,122.80 = 7,121.44/x
  3. Step 3: Cross multiply
    8,064.64x = 11,122.80 × 7,121.44
  4. Step 4: Simplify right side
    8,064.64x = 79,210,352.83
  5. Step 5: Solve for x
    x = 79,210,352.83/8,064.64
  6. Step 6: Final answer
    x = 9,821.93

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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.