Home / 20,924.08-28,879.32-12,969.84

Finding the Fourth Proportional to 20,924.08, 28,879.32 and 12,969.84

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Solution

The fourth proportional to 20,924.08, 28,879.32 and 12,969.84 is: 17,900.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,924.08 : 28,879.32 = 12,969.84 : x
  2. Step 2: Convert to fraction form
    20,924.08/28,879.32 = 12,969.84/x
  3. Step 3: Cross multiply
    20,924.08x = 28,879.32 × 12,969.84
  4. Step 4: Simplify right side
    20,924.08x = 374,560,159.71
  5. Step 5: Solve for x
    x = 374,560,159.71/20,924.08
  6. Step 6: Final answer
    x = 17,900.91

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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.