Home / 20,992.18-28,966.26-11,561.36

Finding the Fourth Proportional to 20,992.18, 28,966.26 and 11,561.36

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Solution

The fourth proportional to 20,992.18, 28,966.26 and 11,561.36 is: 15,953.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.18 : 28,966.26 = 11,561.36 : x
  2. Step 2: Convert to fraction form
    20,992.18/28,966.26 = 11,561.36/x
  3. Step 3: Cross multiply
    20,992.18x = 28,966.26 × 11,561.36
  4. Step 4: Simplify right side
    20,992.18x = 334,889,359.71
  5. Step 5: Solve for x
    x = 334,889,359.71/20,992.18
  6. Step 6: Final answer
    x = 15,953.05

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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.