Home / 21,069.90-31,606.66-5,487.50

Finding the Fourth Proportional to 21,069.90, 31,606.66 and 5,487.50

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Solution

The fourth proportional to 21,069.90, 31,606.66 and 5,487.50 is: 8,231.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.90 : 31,606.66 = 5,487.50 : x
  2. Step 2: Convert to fraction form
    21,069.90/31,606.66 = 5,487.50/x
  3. Step 3: Cross multiply
    21,069.90x = 31,606.66 × 5,487.50
  4. Step 4: Simplify right side
    21,069.90x = 173,441,546.75
  5. Step 5: Solve for x
    x = 173,441,546.75/21,069.90
  6. Step 6: Final answer
    x = 8,231.72

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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.