Home / 20,428.24-28,191.71-11,475.55

Finding the Fourth Proportional to 20,428.24, 28,191.71 and 11,475.55

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Solution

The fourth proportional to 20,428.24, 28,191.71 and 11,475.55 is: 15,836.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.24 : 28,191.71 = 11,475.55 : x
  2. Step 2: Convert to fraction form
    20,428.24/28,191.71 = 11,475.55/x
  3. Step 3: Cross multiply
    20,428.24x = 28,191.71 × 11,475.55
  4. Step 4: Simplify right side
    20,428.24x = 323,515,377.69
  5. Step 5: Solve for x
    x = 323,515,377.69/20,428.24
  6. Step 6: Final answer
    x = 15,836.67

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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.