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Finding the Fourth Proportional to 19,811.70, 29,699.04 and 9,939.42

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Solution

The fourth proportional to 19,811.70, 29,699.04 and 9,939.42 is: 14,899.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.70 : 29,699.04 = 9,939.42 : x
  2. Step 2: Convert to fraction form
    19,811.70/29,699.04 = 9,939.42/x
  3. Step 3: Cross multiply
    19,811.70x = 29,699.04 × 9,939.42
  4. Step 4: Simplify right side
    19,811.70x = 295,191,232.16
  5. Step 5: Solve for x
    x = 295,191,232.16/19,811.70
  6. Step 6: Final answer
    x = 14,899.84

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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.