Home / 20,538.13-28,350.29-15,991.81

Finding the Fourth Proportional to 20,538.13, 28,350.29 and 15,991.81

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Solution

The fourth proportional to 20,538.13, 28,350.29 and 15,991.81 is: 22,074.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.13 : 28,350.29 = 15,991.81 : x
  2. Step 2: Convert to fraction form
    20,538.13/28,350.29 = 15,991.81/x
  3. Step 3: Cross multiply
    20,538.13x = 28,350.29 × 15,991.81
  4. Step 4: Simplify right side
    20,538.13x = 453,372,371.17
  5. Step 5: Solve for x
    x = 453,372,371.17/20,538.13
  6. Step 6: Final answer
    x = 22,074.67

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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.