Home / 20,749.32-28,624.80-12,788.64

Finding the Fourth Proportional to 20,749.32, 28,624.80 and 12,788.64

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Solution

The fourth proportional to 20,749.32, 28,624.80 and 12,788.64 is: 17,642.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.32 : 28,624.80 = 12,788.64 : x
  2. Step 2: Convert to fraction form
    20,749.32/28,624.80 = 12,788.64/x
  3. Step 3: Cross multiply
    20,749.32x = 28,624.80 × 12,788.64
  4. Step 4: Simplify right side
    20,749.32x = 366,072,262.27
  5. Step 5: Solve for x
    x = 366,072,262.27/20,749.32
  6. Step 6: Final answer
    x = 17,642.61

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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.