Home / 20,660.31-30,984.93-8,970.75

Finding the Fourth Proportional to 20,660.31, 30,984.93 and 8,970.75

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Solution

The fourth proportional to 20,660.31, 30,984.93 and 8,970.75 is: 13,453.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.31 : 30,984.93 = 8,970.75 : x
  2. Step 2: Convert to fraction form
    20,660.31/30,984.93 = 8,970.75/x
  3. Step 3: Cross multiply
    20,660.31x = 30,984.93 × 8,970.75
  4. Step 4: Simplify right side
    20,660.31x = 277,958,060.80
  5. Step 5: Solve for x
    x = 277,958,060.80/20,660.31
  6. Step 6: Final answer
    x = 13,453.72

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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.