Home / 20,961.72-28,926.60-11,888.74

Finding the Fourth Proportional to 20,961.72, 28,926.60 and 11,888.74

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Solution

The fourth proportional to 20,961.72, 28,926.60 and 11,888.74 is: 16,406.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.72 : 28,926.60 = 11,888.74 : x
  2. Step 2: Convert to fraction form
    20,961.72/28,926.60 = 11,888.74/x
  3. Step 3: Cross multiply
    20,961.72x = 28,926.60 × 11,888.74
  4. Step 4: Simplify right side
    20,961.72x = 343,900,826.48
  5. Step 5: Solve for x
    x = 343,900,826.48/20,961.72
  6. Step 6: Final answer
    x = 16,406.14

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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.