Home / 21,271.83-29,354.63-13,318.44

Finding the Fourth Proportional to 21,271.83, 29,354.63 and 13,318.44

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Solution

The fourth proportional to 21,271.83, 29,354.63 and 13,318.44 is: 18,379.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.83 : 29,354.63 = 13,318.44 : x
  2. Step 2: Convert to fraction form
    21,271.83/29,354.63 = 13,318.44/x
  3. Step 3: Cross multiply
    21,271.83x = 29,354.63 × 13,318.44
  4. Step 4: Simplify right side
    21,271.83x = 390,957,764.90
  5. Step 5: Solve for x
    x = 390,957,764.90/21,271.83
  6. Step 6: Final answer
    x = 18,379.14

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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.