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Finding the Fourth Proportional to 12,611.93, 18,917.48 and 5,214.20

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Solution

The fourth proportional to 12,611.93, 18,917.48 and 5,214.20 is: 7,821.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.93 : 18,917.48 = 5,214.20 : x
  2. Step 2: Convert to fraction form
    12,611.93/18,917.48 = 5,214.20/x
  3. Step 3: Cross multiply
    12,611.93x = 18,917.48 × 5,214.20
  4. Step 4: Simplify right side
    12,611.93x = 98,639,442.66
  5. Step 5: Solve for x
    x = 98,639,442.66/12,611.93
  6. Step 6: Final answer
    x = 7,821.13

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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.