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Finding the Fourth Proportional to 19,812.70, 29,700.54 and 9,940.42

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Solution

The fourth proportional to 19,812.70, 29,700.54 and 9,940.42 is: 14,901.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,812.70 : 29,700.54 = 9,940.42 : x
  2. Step 2: Convert to fraction form
    19,812.70/29,700.54 = 9,940.42/x
  3. Step 3: Cross multiply
    19,812.70x = 29,700.54 × 9,940.42
  4. Step 4: Simplify right side
    19,812.70x = 295,235,841.83
  5. Step 5: Solve for x
    x = 295,235,841.83/19,812.70
  6. Step 6: Final answer
    x = 14,901.34

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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.