Home / 20,708.88-28,544.96-13,992.40

Finding the Fourth Proportional to 20,708.88, 28,544.96 and 13,992.40

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Solution

The fourth proportional to 20,708.88, 28,544.96 and 13,992.40 is: 19,287.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.88 : 28,544.96 = 13,992.40 : x
  2. Step 2: Convert to fraction form
    20,708.88/28,544.96 = 13,992.40/x
  3. Step 3: Cross multiply
    20,708.88x = 28,544.96 × 13,992.40
  4. Step 4: Simplify right side
    20,708.88x = 399,412,498.30
  5. Step 5: Solve for x
    x = 399,412,498.30/20,708.88
  6. Step 6: Final answer
    x = 19,287.02

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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.