Home / 20,345.25-28,077.24-11,392.67

Finding the Fourth Proportional to 20,345.25, 28,077.24 and 11,392.67

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Solution

The fourth proportional to 20,345.25, 28,077.24 and 11,392.67 is: 15,722.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.25 : 28,077.24 = 11,392.67 : x
  2. Step 2: Convert to fraction form
    20,345.25/28,077.24 = 11,392.67/x
  3. Step 3: Cross multiply
    20,345.25x = 28,077.24 × 11,392.67
  4. Step 4: Simplify right side
    20,345.25x = 319,874,729.83
  5. Step 5: Solve for x
    x = 319,874,729.83/20,345.25
  6. Step 6: Final answer
    x = 15,722.33

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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.