Home / 28,557.39-39,407.86-15,636.43

Finding the Fourth Proportional to 28,557.39, 39,407.86 and 15,636.43

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Solution

The fourth proportional to 28,557.39, 39,407.86 and 15,636.43 is: 21,577.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,557.39 : 39,407.86 = 15,636.43 : x
  2. Step 2: Convert to fraction form
    28,557.39/39,407.86 = 15,636.43/x
  3. Step 3: Cross multiply
    28,557.39x = 39,407.86 × 15,636.43
  4. Step 4: Simplify right side
    28,557.39x = 616,198,106.73
  5. Step 5: Solve for x
    x = 616,198,106.73/28,557.39
  6. Step 6: Final answer
    x = 21,577.54

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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.