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Finding the Fourth Proportional to 19,691.93, 29,529.18 and 7,208.70

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Solution

The fourth proportional to 19,691.93, 29,529.18 and 7,208.70 is: 10,809.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,691.93 : 29,529.18 = 7,208.70 : x
  2. Step 2: Convert to fraction form
    19,691.93/29,529.18 = 7,208.70/x
  3. Step 3: Cross multiply
    19,691.93x = 29,529.18 × 7,208.70
  4. Step 4: Simplify right side
    19,691.93x = 212,866,999.87
  5. Step 5: Solve for x
    x = 212,866,999.87/19,691.93
  6. Step 6: Final answer
    x = 10,809.86

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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.