Home / 20,743.87-28,626.48-11,312.43

Finding the Fourth Proportional to 20,743.87, 28,626.48 and 11,312.43

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Solution

The fourth proportional to 20,743.87, 28,626.48 and 11,312.43 is: 15,611.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.87 : 28,626.48 = 11,312.43 : x
  2. Step 2: Convert to fraction form
    20,743.87/28,626.48 = 11,312.43/x
  3. Step 3: Cross multiply
    20,743.87x = 28,626.48 × 11,312.43
  4. Step 4: Simplify right side
    20,743.87x = 323,835,051.15
  5. Step 5: Solve for x
    x = 323,835,051.15/20,743.87
  6. Step 6: Final answer
    x = 15,611.12

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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.