Home / 20,743.67-28,626.86-11,312.75

Finding the Fourth Proportional to 20,743.67, 28,626.86 and 11,312.75

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Solution

The fourth proportional to 20,743.67, 28,626.86 and 11,312.75 is: 15,611.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.67 : 28,626.86 = 11,312.75 : x
  2. Step 2: Convert to fraction form
    20,743.67/28,626.86 = 11,312.75/x
  3. Step 3: Cross multiply
    20,743.67x = 28,626.86 × 11,312.75
  4. Step 4: Simplify right side
    20,743.67x = 323,848,510.47
  5. Step 5: Solve for x
    x = 323,848,510.47/20,743.67
  6. Step 6: Final answer
    x = 15,611.92

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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.