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Finding the Fourth Proportional to 19,659.67, 29,420.22 and 12,267.61

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Solution

The fourth proportional to 19,659.67, 29,420.22 and 12,267.61 is: 18,358.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.67 : 29,420.22 = 12,267.61 : x
  2. Step 2: Convert to fraction form
    19,659.67/29,420.22 = 12,267.61/x
  3. Step 3: Cross multiply
    19,659.67x = 29,420.22 × 12,267.61
  4. Step 4: Simplify right side
    19,659.67x = 360,915,785.07
  5. Step 5: Solve for x
    x = 360,915,785.07/19,659.67
  6. Step 6: Final answer
    x = 18,358.18

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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.