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Finding the Fourth Proportional to 8,655.66, 11,942.64 and 5,120.01

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Solution

The fourth proportional to 8,655.66, 11,942.64 and 5,120.01 is: 7,064.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.66 : 11,942.64 = 5,120.01 : x
  2. Step 2: Convert to fraction form
    8,655.66/11,942.64 = 5,120.01/x
  3. Step 3: Cross multiply
    8,655.66x = 11,942.64 × 5,120.01
  4. Step 4: Simplify right side
    8,655.66x = 61,146,436.23
  5. Step 5: Solve for x
    x = 61,146,436.23/8,655.66
  6. Step 6: Final answer
    x = 7,064.33

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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.