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Finding the Fourth Proportional to 19,906.56, 29,859.12 and 5,116.32

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Solution

The fourth proportional to 19,906.56, 29,859.12 and 5,116.32 is: 7,674.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,906.56 : 29,859.12 = 5,116.32 : x
  2. Step 2: Convert to fraction form
    19,906.56/29,859.12 = 5,116.32/x
  3. Step 3: Cross multiply
    19,906.56x = 29,859.12 × 5,116.32
  4. Step 4: Simplify right side
    19,906.56x = 152,768,812.84
  5. Step 5: Solve for x
    x = 152,768,812.84/19,906.56
  6. Step 6: Final answer
    x = 7,674.29

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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.