Home / 20,841.47-28,760.91-11,889.11

Finding the Fourth Proportional to 20,841.47, 28,760.91 and 11,889.11

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Solution

The fourth proportional to 20,841.47, 28,760.91 and 11,889.11 is: 16,406.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.47 : 28,760.91 = 11,889.11 : x
  2. Step 2: Convert to fraction form
    20,841.47/28,760.91 = 11,889.11/x
  3. Step 3: Cross multiply
    20,841.47x = 28,760.91 × 11,889.11
  4. Step 4: Simplify right side
    20,841.47x = 341,941,478.89
  5. Step 5: Solve for x
    x = 341,941,478.89/20,841.47
  6. Step 6: Final answer
    x = 16,406.79

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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.