Home / 22,720.56-31,347.08-13,765.20

Finding the Fourth Proportional to 22,720.56, 31,347.08 and 13,765.20

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Solution

The fourth proportional to 22,720.56, 31,347.08 and 13,765.20 is: 18,991.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,720.56 : 31,347.08 = 13,765.20 : x
  2. Step 2: Convert to fraction form
    22,720.56/31,347.08 = 13,765.20/x
  3. Step 3: Cross multiply
    22,720.56x = 31,347.08 × 13,765.20
  4. Step 4: Simplify right side
    22,720.56x = 431,498,825.62
  5. Step 5: Solve for x
    x = 431,498,825.62/22,720.56
  6. Step 6: Final answer
    x = 18,991.56

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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.