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Finding the Fourth Proportional to 15,078.94, 20,807.26 and 8,362.89

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Solution

The fourth proportional to 15,078.94, 20,807.26 and 8,362.89 is: 11,539.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,078.94 : 20,807.26 = 8,362.89 : x
  2. Step 2: Convert to fraction form
    15,078.94/20,807.26 = 8,362.89/x
  3. Step 3: Cross multiply
    15,078.94x = 20,807.26 × 8,362.89
  4. Step 4: Simplify right side
    15,078.94x = 174,008,795.47
  5. Step 5: Solve for x
    x = 174,008,795.47/15,078.94
  6. Step 6: Final answer
    x = 11,539.85

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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.