Home / 20,636.31-28,478.72-11,205.48

Finding the Fourth Proportional to 20,636.31, 28,478.72 and 11,205.48

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Solution

The fourth proportional to 20,636.31, 28,478.72 and 11,205.48 is: 15,463.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.31 : 28,478.72 = 11,205.48 : x
  2. Step 2: Convert to fraction form
    20,636.31/28,478.72 = 11,205.48/x
  3. Step 3: Cross multiply
    20,636.31x = 28,478.72 × 11,205.48
  4. Step 4: Simplify right side
    20,636.31x = 319,117,727.39
  5. Step 5: Solve for x
    x = 319,117,727.39/20,636.31
  6. Step 6: Final answer
    x = 15,463.89

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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.