Home / 20,896.18-28,829.16-13,729.95

Finding the Fourth Proportional to 20,896.18, 28,829.16 and 13,729.95

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Solution

The fourth proportional to 20,896.18, 28,829.16 and 13,729.95 is: 18,942.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.18 : 28,829.16 = 13,729.95 : x
  2. Step 2: Convert to fraction form
    20,896.18/28,829.16 = 13,729.95/x
  3. Step 3: Cross multiply
    20,896.18x = 28,829.16 × 13,729.95
  4. Step 4: Simplify right side
    20,896.18x = 395,822,925.34
  5. Step 5: Solve for x
    x = 395,822,925.34/20,896.18
  6. Step 6: Final answer
    x = 18,942.36

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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.