Home / 20,404.10-28,159.83-11,451.68

Finding the Fourth Proportional to 20,404.10, 28,159.83 and 11,451.68

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Solution

The fourth proportional to 20,404.10, 28,159.83 and 11,451.68 is: 15,804.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404.10 : 28,159.83 = 11,451.68 : x
  2. Step 2: Convert to fraction form
    20,404.10/28,159.83 = 11,451.68/x
  3. Step 3: Cross multiply
    20,404.10x = 28,159.83 × 11,451.68
  4. Step 4: Simplify right side
    20,404.10x = 322,477,294.61
  5. Step 5: Solve for x
    x = 322,477,294.61/20,404.10
  6. Step 6: Final answer
    x = 15,804.53

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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.