Home / 21,078.08-29,091.83-13,533.95

Finding the Fourth Proportional to 21,078.08, 29,091.83 and 13,533.95

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Solution

The fourth proportional to 21,078.08, 29,091.83 and 13,533.95 is: 18,679.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.08 : 29,091.83 = 13,533.95 : x
  2. Step 2: Convert to fraction form
    21,078.08/29,091.83 = 13,533.95/x
  3. Step 3: Cross multiply
    21,078.08x = 29,091.83 × 13,533.95
  4. Step 4: Simplify right side
    21,078.08x = 393,727,372.63
  5. Step 5: Solve for x
    x = 393,727,372.63/21,078.08
  6. Step 6: Final answer
    x = 18,679.47

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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.