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Finding the Fourth Proportional to 6,611.36, 9,917.28 and 1,681.11

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Solution

The fourth proportional to 6,611.36, 9,917.28 and 1,681.11 is: 2,521.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,611.36 : 9,917.28 = 1,681.11 : x
  2. Step 2: Convert to fraction form
    6,611.36/9,917.28 = 1,681.11/x
  3. Step 3: Cross multiply
    6,611.36x = 9,917.28 × 1,681.11
  4. Step 4: Simplify right side
    6,611.36x = 16,672,038.58
  5. Step 5: Solve for x
    x = 16,672,038.58/6,611.36
  6. Step 6: Final answer
    x = 2,521.73

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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.