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Finding the Fourth Proportional to 12,351.15, 18,518.54 and 6,807.15

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Solution

The fourth proportional to 12,351.15, 18,518.54 and 6,807.15 is: 10,206.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,351.15 : 18,518.54 = 6,807.15 : x
  2. Step 2: Convert to fraction form
    12,351.15/18,518.54 = 6,807.15/x
  3. Step 3: Cross multiply
    12,351.15x = 18,518.54 × 6,807.15
  4. Step 4: Simplify right side
    12,351.15x = 126,058,445.53
  5. Step 5: Solve for x
    x = 126,058,445.53/12,351.15
  6. Step 6: Final answer
    x = 10,206.21

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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.