Home / 19,728.20-29,543.70-13,118.60

Finding the Fourth Proportional to 19,728.20, 29,543.70 and 13,118.60

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Solution

The fourth proportional to 19,728.20, 29,543.70 and 13,118.60 is: 19,645.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,728.20 : 29,543.70 = 13,118.60 : x
  2. Step 2: Convert to fraction form
    19,728.20/29,543.70 = 13,118.60/x
  3. Step 3: Cross multiply
    19,728.20x = 29,543.70 × 13,118.60
  4. Step 4: Simplify right side
    19,728.20x = 387,571,982.82
  5. Step 5: Solve for x
    x = 387,571,982.82/19,728.20
  6. Step 6: Final answer
    x = 19,645.58

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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.