Home / 21,293.45-31,907.31-13,485.86

Finding the Fourth Proportional to 21,293.45, 31,907.31 and 13,485.86

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Solution

The fourth proportional to 21,293.45, 31,907.31 and 13,485.86 is: 20,207.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.45 : 31,907.31 = 13,485.86 : x
  2. Step 2: Convert to fraction form
    21,293.45/31,907.31 = 13,485.86/x
  3. Step 3: Cross multiply
    21,293.45x = 31,907.31 × 13,485.86
  4. Step 4: Simplify right side
    21,293.45x = 430,297,356.10
  5. Step 5: Solve for x
    x = 430,297,356.10/21,293.45
  6. Step 6: Final answer
    x = 20,207.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.