Home / 20,731.85-28,610.56-12,666.83

Finding the Fourth Proportional to 20,731.85, 28,610.56 and 12,666.83

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Solution

The fourth proportional to 20,731.85, 28,610.56 and 12,666.83 is: 17,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.85 : 28,610.56 = 12,666.83 : x
  2. Step 2: Convert to fraction form
    20,731.85/28,610.56 = 12,666.83/x
  3. Step 3: Cross multiply
    20,731.85x = 28,610.56 × 12,666.83
  4. Step 4: Simplify right side
    20,731.85x = 362,405,139.58
  5. Step 5: Solve for x
    x = 362,405,139.58/20,731.85
  6. Step 6: Final answer
    x = 17,480.60

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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.