Home / 20,918.88-28,867.52-11,487.20

Finding the Fourth Proportional to 20,918.88, 28,867.52 and 11,487.20

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Solution

The fourth proportional to 20,918.88, 28,867.52 and 11,487.20 is: 15,852.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.88 : 28,867.52 = 11,487.20 : x
  2. Step 2: Convert to fraction form
    20,918.88/28,867.52 = 11,487.20/x
  3. Step 3: Cross multiply
    20,918.88x = 28,867.52 × 11,487.20
  4. Step 4: Simplify right side
    20,918.88x = 331,606,975.74
  5. Step 5: Solve for x
    x = 331,606,975.74/20,918.88
  6. Step 6: Final answer
    x = 15,852.04

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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.