Home / 20,328.47-28,049.60-11,713.31

Finding the Fourth Proportional to 20,328.47, 28,049.60 and 11,713.31

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Solution

The fourth proportional to 20,328.47, 28,049.60 and 11,713.31 is: 16,162.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.47 : 28,049.60 = 11,713.31 : x
  2. Step 2: Convert to fraction form
    20,328.47/28,049.60 = 11,713.31/x
  3. Step 3: Cross multiply
    20,328.47x = 28,049.60 × 11,713.31
  4. Step 4: Simplify right side
    20,328.47x = 328,553,759.58
  5. Step 5: Solve for x
    x = 328,553,759.58/20,328.47
  6. Step 6: Final answer
    x = 16,162.25

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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.