Home / 20,811.79-28,714.74-11,859.10

Finding the Fourth Proportional to 20,811.79, 28,714.74 and 11,859.10

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Solution

The fourth proportional to 20,811.79, 28,714.74 and 11,859.10 is: 16,362.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.79 : 28,714.74 = 11,859.10 : x
  2. Step 2: Convert to fraction form
    20,811.79/28,714.74 = 11,859.10/x
  3. Step 3: Cross multiply
    20,811.79x = 28,714.74 × 11,859.10
  4. Step 4: Simplify right side
    20,811.79x = 340,530,973.13
  5. Step 5: Solve for x
    x = 340,530,973.13/20,811.79
  6. Step 6: Final answer
    x = 16,362.41

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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.