Home / 21,656.52-29,865.66-13,684.50

Finding the Fourth Proportional to 21,656.52, 29,865.66 and 13,684.50

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Solution

The fourth proportional to 21,656.52, 29,865.66 and 13,684.50 is: 18,871.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.52 : 29,865.66 = 13,684.50 : x
  2. Step 2: Convert to fraction form
    21,656.52/29,865.66 = 13,684.50/x
  3. Step 3: Cross multiply
    21,656.52x = 29,865.66 × 13,684.50
  4. Step 4: Simplify right side
    21,656.52x = 408,696,624.27
  5. Step 5: Solve for x
    x = 408,696,624.27/21,656.52
  6. Step 6: Final answer
    x = 18,871.76

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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.