Home / 20,359.32-28,100.72-11,980.68

Finding the Fourth Proportional to 20,359.32, 28,100.72 and 11,980.68

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Solution

The fourth proportional to 20,359.32, 28,100.72 and 11,980.68 is: 16,536.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,359.32 : 28,100.72 = 11,980.68 : x
  2. Step 2: Convert to fraction form
    20,359.32/28,100.72 = 11,980.68/x
  3. Step 3: Cross multiply
    20,359.32x = 28,100.72 × 11,980.68
  4. Step 4: Simplify right side
    20,359.32x = 336,665,674.19
  5. Step 5: Solve for x
    x = 336,665,674.19/20,359.32
  6. Step 6: Final answer
    x = 16,536.19

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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.