Home / 20,209.35-27,888.15-11,256.66

Finding the Fourth Proportional to 20,209.35, 27,888.15 and 11,256.66

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Solution

The fourth proportional to 20,209.35, 27,888.15 and 11,256.66 is: 15,533.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.35 : 27,888.15 = 11,256.66 : x
  2. Step 2: Convert to fraction form
    20,209.35/27,888.15 = 11,256.66/x
  3. Step 3: Cross multiply
    20,209.35x = 27,888.15 × 11,256.66
  4. Step 4: Simplify right side
    20,209.35x = 313,927,422.58
  5. Step 5: Solve for x
    x = 313,927,422.58/20,209.35
  6. Step 6: Final answer
    x = 15,533.77

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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.