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Finding the Fourth Proportional to 19,957.10, 29,919.41 and 7,470.12

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Solution

The fourth proportional to 19,957.10, 29,919.41 and 7,470.12 is: 11,199.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,957.10 : 29,919.41 = 7,470.12 : x
  2. Step 2: Convert to fraction form
    19,957.10/29,919.41 = 7,470.12/x
  3. Step 3: Cross multiply
    19,957.10x = 29,919.41 × 7,470.12
  4. Step 4: Simplify right side
    19,957.10x = 223,501,685.89
  5. Step 5: Solve for x
    x = 223,501,685.89/19,957.10
  6. Step 6: Final answer
    x = 11,199.11

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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.