Home / 11,078.81-15,294.39-8,555.25

Finding the Fourth Proportional to 11,078.81, 15,294.39 and 8,555.25

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Solution

The fourth proportional to 11,078.81, 15,294.39 and 8,555.25 is: 11,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,078.81 : 15,294.39 = 8,555.25 : x
  2. Step 2: Convert to fraction form
    11,078.81/15,294.39 = 8,555.25/x
  3. Step 3: Cross multiply
    11,078.81x = 15,294.39 × 8,555.25
  4. Step 4: Simplify right side
    11,078.81x = 130,847,362.13
  5. Step 5: Solve for x
    x = 130,847,362.13/11,078.81
  6. Step 6: Final answer
    x = 11,810.60

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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.