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Finding the Fourth Proportional to 19,390.74, 29,086.12 and 5,539.74

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Solution

The fourth proportional to 19,390.74, 29,086.12 and 5,539.74 is: 8,309.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,390.74 : 29,086.12 = 5,539.74 : x
  2. Step 2: Convert to fraction form
    19,390.74/29,086.12 = 5,539.74/x
  3. Step 3: Cross multiply
    19,390.74x = 29,086.12 × 5,539.74
  4. Step 4: Simplify right side
    19,390.74x = 161,129,587.43
  5. Step 5: Solve for x
    x = 161,129,587.43/19,390.74
  6. Step 6: Final answer
    x = 8,309.61

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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.