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Finding the Fourth Proportional to 19,999.19, 29,998.79 and 5,208.06

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Solution

The fourth proportional to 19,999.19, 29,998.79 and 5,208.06 is: 7,812.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,999.19 : 29,998.79 = 5,208.06 : x
  2. Step 2: Convert to fraction form
    19,999.19/29,998.79 = 5,208.06/x
  3. Step 3: Cross multiply
    19,999.19x = 29,998.79 × 5,208.06
  4. Step 4: Simplify right side
    19,999.19x = 156,235,604.23
  5. Step 5: Solve for x
    x = 156,235,604.23/19,999.19
  6. Step 6: Final answer
    x = 7,812.10

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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.