Home / 20,380.60-28,140.78-14,111.20

Finding the Fourth Proportional to 20,380.60, 28,140.78 and 14,111.20

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Solution

The fourth proportional to 20,380.60, 28,140.78 and 14,111.20 is: 19,484.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.60 : 28,140.78 = 14,111.20 : x
  2. Step 2: Convert to fraction form
    20,380.60/28,140.78 = 14,111.20/x
  3. Step 3: Cross multiply
    20,380.60x = 28,140.78 × 14,111.20
  4. Step 4: Simplify right side
    20,380.60x = 397,100,174.74
  5. Step 5: Solve for x
    x = 397,100,174.74/20,380.60
  6. Step 6: Final answer
    x = 19,484.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.