Home / 20,886.13-28,822.51-11,811.35

Finding the Fourth Proportional to 20,886.13, 28,822.51 and 11,811.35

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Solution

The fourth proportional to 20,886.13, 28,822.51 and 11,811.35 is: 16,299.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.13 : 28,822.51 = 11,811.35 : x
  2. Step 2: Convert to fraction form
    20,886.13/28,822.51 = 11,811.35/x
  3. Step 3: Cross multiply
    20,886.13x = 28,822.51 × 11,811.35
  4. Step 4: Simplify right side
    20,886.13x = 340,432,753.49
  5. Step 5: Solve for x
    x = 340,432,753.49/20,886.13
  6. Step 6: Final answer
    x = 16,299.47

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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.