Home / 20,404.58-28,159.92-11,451.51

Finding the Fourth Proportional to 20,404.58, 28,159.92 and 11,451.51

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Solution

The fourth proportional to 20,404.58, 28,159.92 and 11,451.51 is: 15,803.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404.58 : 28,159.92 = 11,451.51 : x
  2. Step 2: Convert to fraction form
    20,404.58/28,159.92 = 11,451.51/x
  3. Step 3: Cross multiply
    20,404.58x = 28,159.92 × 11,451.51
  4. Step 4: Simplify right side
    20,404.58x = 322,473,605.48
  5. Step 5: Solve for x
    x = 322,473,605.48/20,404.58
  6. Step 6: Final answer
    x = 15,803.99

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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.