Home / 11,998.07-16,557.28-7,220.78

Finding the Fourth Proportional to 11,998.07, 16,557.28 and 7,220.78

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Solution

The fourth proportional to 11,998.07, 16,557.28 and 7,220.78 is: 9,964.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,998.07 : 16,557.28 = 7,220.78 : x
  2. Step 2: Convert to fraction form
    11,998.07/16,557.28 = 7,220.78/x
  3. Step 3: Cross multiply
    11,998.07x = 16,557.28 × 7,220.78
  4. Step 4: Simplify right side
    11,998.07x = 119,556,476.28
  5. Step 5: Solve for x
    x = 119,556,476.28/11,998.07
  6. Step 6: Final answer
    x = 9,964.64

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Half scale
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Double scale
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Similar ratio
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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.