Home / 20,891.42-28,829.61-11,459.39

Finding the Fourth Proportional to 20,891.42, 28,829.61 and 11,459.39

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Solution

The fourth proportional to 20,891.42, 28,829.61 and 11,459.39 is: 15,813.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.42 : 28,829.61 = 11,459.39 : x
  2. Step 2: Convert to fraction form
    20,891.42/28,829.61 = 11,459.39/x
  3. Step 3: Cross multiply
    20,891.42x = 28,829.61 × 11,459.39
  4. Step 4: Simplify right side
    20,891.42x = 330,369,744.54
  5. Step 5: Solve for x
    x = 330,369,744.54/20,891.42
  6. Step 6: Final answer
    x = 15,813.66

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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.