Home / 20,120.77-27,765.37-12,566.65

Finding the Fourth Proportional to 20,120.77, 27,765.37 and 12,566.65

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Solution

The fourth proportional to 20,120.77, 27,765.37 and 12,566.65 is: 17,341.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.77 : 27,765.37 = 12,566.65 : x
  2. Step 2: Convert to fraction form
    20,120.77/27,765.37 = 12,566.65/x
  3. Step 3: Cross multiply
    20,120.77x = 27,765.37 × 12,566.65
  4. Step 4: Simplify right side
    20,120.77x = 348,917,624.08
  5. Step 5: Solve for x
    x = 348,917,624.08/20,120.77
  6. Step 6: Final answer
    x = 17,341.17

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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.