Home / 20,008.20-29,969.10-13,009.80

Finding the Fourth Proportional to 20,008.20, 29,969.10 and 13,009.80

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Solution

The fourth proportional to 20,008.20, 29,969.10 and 13,009.80 is: 19,486.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,008.20 : 29,969.10 = 13,009.80 : x
  2. Step 2: Convert to fraction form
    20,008.20/29,969.10 = 13,009.80/x
  3. Step 3: Cross multiply
    20,008.20x = 29,969.10 × 13,009.80
  4. Step 4: Simplify right side
    20,008.20x = 389,891,997.18
  5. Step 5: Solve for x
    x = 389,891,997.18/20,008.20
  6. Step 6: Final answer
    x = 19,486.61

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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.