Home / 28,512.36-39,345.35-15,764.78

Finding the Fourth Proportional to 28,512.36, 39,345.35 and 15,764.78

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Solution

The fourth proportional to 28,512.36, 39,345.35 and 15,764.78 is: 21,754.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.36 : 39,345.35 = 15,764.78 : x
  2. Step 2: Convert to fraction form
    28,512.36/39,345.35 = 15,764.78/x
  3. Step 3: Cross multiply
    28,512.36x = 39,345.35 × 15,764.78
  4. Step 4: Simplify right side
    28,512.36x = 620,270,511.22
  5. Step 5: Solve for x
    x = 620,270,511.22/28,512.36
  6. Step 6: Final answer
    x = 21,754.44

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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.