Home / 21,293.90-31,947.02-8,811.62

Finding the Fourth Proportional to 21,293.90, 31,947.02 and 8,811.62

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Solution

The fourth proportional to 21,293.90, 31,947.02 and 8,811.62 is: 13,219.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.90 : 31,947.02 = 8,811.62 : x
  2. Step 2: Convert to fraction form
    21,293.90/31,947.02 = 8,811.62/x
  3. Step 3: Cross multiply
    21,293.90x = 31,947.02 × 8,811.62
  4. Step 4: Simplify right side
    21,293.90x = 281,504,956.31
  5. Step 5: Solve for x
    x = 281,504,956.31/21,293.90
  6. Step 6: Final answer
    x = 13,219.98

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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.