Home / 21,290.60-31,896.98-15,432.68

Finding the Fourth Proportional to 21,290.60, 31,896.98 and 15,432.68

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Solution

The fourth proportional to 21,290.60, 31,896.98 and 15,432.68 is: 23,120.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.60 : 31,896.98 = 15,432.68 : x
  2. Step 2: Convert to fraction form
    21,290.60/31,896.98 = 15,432.68/x
  3. Step 3: Cross multiply
    21,290.60x = 31,896.98 × 15,432.68
  4. Step 4: Simplify right side
    21,290.60x = 492,255,885.31
  5. Step 5: Solve for x
    x = 492,255,885.31/21,290.60
  6. Step 6: Final answer
    x = 23,120.81

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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.