Home / 20,671.32-28,526.40-11,239.95

Finding the Fourth Proportional to 20,671.32, 28,526.40 and 11,239.95

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Solution

The fourth proportional to 20,671.32, 28,526.40 and 11,239.95 is: 15,511.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,671.32 : 28,526.40 = 11,239.95 : x
  2. Step 2: Convert to fraction form
    20,671.32/28,526.40 = 11,239.95/x
  3. Step 3: Cross multiply
    20,671.32x = 28,526.40 × 11,239.95
  4. Step 4: Simplify right side
    20,671.32x = 320,635,309.68
  5. Step 5: Solve for x
    x = 320,635,309.68/20,671.32
  6. Step 6: Final answer
    x = 15,511.12

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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.