Home / 20,470.35-28,250.46-15,425.67

Finding the Fourth Proportional to 20,470.35, 28,250.46 and 15,425.67

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Solution

The fourth proportional to 20,470.35, 28,250.46 and 15,425.67 is: 21,288.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,470.35 : 28,250.46 = 15,425.67 : x
  2. Step 2: Convert to fraction form
    20,470.35/28,250.46 = 15,425.67/x
  3. Step 3: Cross multiply
    20,470.35x = 28,250.46 × 15,425.67
  4. Step 4: Simplify right side
    20,470.35x = 435,782,273.31
  5. Step 5: Solve for x
    x = 435,782,273.31/20,470.35
  6. Step 6: Final answer
    x = 21,288.46

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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.