Home / 19,816.81-29,714.42-9,131.60

Finding the Fourth Proportional to 19,816.81, 29,714.42 and 9,131.60

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Solution

The fourth proportional to 19,816.81, 29,714.42 and 9,131.60 is: 13,692.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,816.81 : 29,714.42 = 9,131.60 : x
  2. Step 2: Convert to fraction form
    19,816.81/29,714.42 = 9,131.60/x
  3. Step 3: Cross multiply
    19,816.81x = 29,714.42 × 9,131.60
  4. Step 4: Simplify right side
    19,816.81x = 271,340,294.79
  5. Step 5: Solve for x
    x = 271,340,294.79/19,816.81
  6. Step 6: Final answer
    x = 13,692.43

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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.