Home / 20,288.09-28,005.36-18,159.86

Finding the Fourth Proportional to 20,288.09, 28,005.36 and 18,159.86

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Solution

The fourth proportional to 20,288.09, 28,005.36 and 18,159.86 is: 25,067.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.09 : 28,005.36 = 18,159.86 : x
  2. Step 2: Convert to fraction form
    20,288.09/28,005.36 = 18,159.86/x
  3. Step 3: Cross multiply
    20,288.09x = 28,005.36 × 18,159.86
  4. Step 4: Simplify right side
    20,288.09x = 508,573,276.82
  5. Step 5: Solve for x
    x = 508,573,276.82/20,288.09
  6. Step 6: Final answer
    x = 25,067.58

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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.