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Finding the Fourth Proportional to 12,368.48, 18,520.32 and 8,480.48

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Solution

The fourth proportional to 12,368.48, 18,520.32 and 8,480.48 is: 12,698.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,368.48 : 18,520.32 = 8,480.48 : x
  2. Step 2: Convert to fraction form
    12,368.48/18,520.32 = 8,480.48/x
  3. Step 3: Cross multiply
    12,368.48x = 18,520.32 × 8,480.48
  4. Step 4: Simplify right side
    12,368.48x = 157,061,203.35
  5. Step 5: Solve for x
    x = 157,061,203.35/12,368.48
  6. Step 6: Final answer
    x = 12,698.50

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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.