Home / 20,701.12-28,566.64-11,269.68

Finding the Fourth Proportional to 20,701.12, 28,566.64 and 11,269.68

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Solution

The fourth proportional to 20,701.12, 28,566.64 and 11,269.68 is: 15,551.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.12 : 28,566.64 = 11,269.68 : x
  2. Step 2: Convert to fraction form
    20,701.12/28,566.64 = 11,269.68/x
  3. Step 3: Cross multiply
    20,701.12x = 28,566.64 × 11,269.68
  4. Step 4: Simplify right side
    20,701.12x = 321,936,891.48
  5. Step 5: Solve for x
    x = 321,936,891.48/20,701.12
  6. Step 6: Final answer
    x = 15,551.67

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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.