Home / 20,315.87-30,466.22-6,985.09

Finding the Fourth Proportional to 20,315.87, 30,466.22 and 6,985.09

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Solution

The fourth proportional to 20,315.87, 30,466.22 and 6,985.09 is: 10,475.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.87 : 30,466.22 = 6,985.09 : x
  2. Step 2: Convert to fraction form
    20,315.87/30,466.22 = 6,985.09/x
  3. Step 3: Cross multiply
    20,315.87x = 30,466.22 × 6,985.09
  4. Step 4: Simplify right side
    20,315.87x = 212,809,101.40
  5. Step 5: Solve for x
    x = 212,809,101.40/20,315.87
  6. Step 6: Final answer
    x = 10,475.02

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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.