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Finding the Fourth Proportional to 19,957.35, 29,919.78 and 7,470.38

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Solution

The fourth proportional to 19,957.35, 29,919.78 and 7,470.38 is: 11,199.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,957.35 : 29,919.78 = 7,470.38 : x
  2. Step 2: Convert to fraction form
    19,957.35/29,919.78 = 7,470.38/x
  3. Step 3: Cross multiply
    19,957.35x = 29,919.78 × 7,470.38
  4. Step 4: Simplify right side
    19,957.35x = 223,511,995.19
  5. Step 5: Solve for x
    x = 223,511,995.19/19,957.35
  6. Step 6: Final answer
    x = 11,199.49

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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.