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Finding the Fourth Proportional to 15,078.22, 20,807.22 and 8,363.32

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Solution

The fourth proportional to 15,078.22, 20,807.22 and 8,363.32 is: 11,540.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,078.22 : 20,807.22 = 8,363.32 : x
  2. Step 2: Convert to fraction form
    15,078.22/20,807.22 = 8,363.32/x
  3. Step 3: Cross multiply
    15,078.22x = 20,807.22 × 8,363.32
  4. Step 4: Simplify right side
    15,078.22x = 174,017,439.17
  5. Step 5: Solve for x
    x = 174,017,439.17/15,078.22
  6. Step 6: Final answer
    x = 11,540.98

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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.