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Finding the Fourth Proportional to 13,461.40, 20,192.10 and 7,917.40

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Solution

The fourth proportional to 13,461.40, 20,192.10 and 7,917.40 is: 11,876.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,461.40 : 20,192.10 = 7,917.40 : x
  2. Step 2: Convert to fraction form
    13,461.40/20,192.10 = 7,917.40/x
  3. Step 3: Cross multiply
    13,461.40x = 20,192.10 × 7,917.40
  4. Step 4: Simplify right side
    13,461.40x = 159,868,932.54
  5. Step 5: Solve for x
    x = 159,868,932.54/13,461.40
  6. Step 6: Final answer
    x = 11,876.10

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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.