Home / 20,373.12-28,110.24-11,420.28

Finding the Fourth Proportional to 20,373.12, 28,110.24 and 11,420.28

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Solution

The fourth proportional to 20,373.12, 28,110.24 and 11,420.28 is: 15,757.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,373.12 : 28,110.24 = 11,420.28 : x
  2. Step 2: Convert to fraction form
    20,373.12/28,110.24 = 11,420.28/x
  3. Step 3: Cross multiply
    20,373.12x = 28,110.24 × 11,420.28
  4. Step 4: Simplify right side
    20,373.12x = 321,026,811.67
  5. Step 5: Solve for x
    x = 321,026,811.67/20,373.12
  6. Step 6: Final answer
    x = 15,757.37

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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.