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Finding the Fourth Proportional to 11,620.96, 17,436.40 and 6,426.40

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Solution

The fourth proportional to 11,620.96, 17,436.40 and 6,426.40 is: 9,642.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,620.96 : 17,436.40 = 6,426.40 : x
  2. Step 2: Convert to fraction form
    11,620.96/17,436.40 = 6,426.40/x
  3. Step 3: Cross multiply
    11,620.96x = 17,436.40 × 6,426.40
  4. Step 4: Simplify right side
    11,620.96x = 112,053,280.96
  5. Step 5: Solve for x
    x = 112,053,280.96/11,620.96
  6. Step 6: Final answer
    x = 9,642.34

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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.