Home / 28,512.11-39,345.11-15,764.55

Finding the Fourth Proportional to 28,512.11, 39,345.11 and 15,764.55

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Solution

The fourth proportional to 28,512.11, 39,345.11 and 15,764.55 is: 21,754.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.11 : 39,345.11 = 15,764.55 : x
  2. Step 2: Convert to fraction form
    28,512.11/39,345.11 = 15,764.55/x
  3. Step 3: Cross multiply
    28,512.11x = 39,345.11 × 15,764.55
  4. Step 4: Simplify right side
    28,512.11x = 620,257,953.85
  5. Step 5: Solve for x
    x = 620,257,953.85/28,512.11
  6. Step 6: Final answer
    x = 21,754.19

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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.