Home / 20,890.20-31,318.85-10,352.98

Finding the Fourth Proportional to 20,890.20, 31,318.85 and 10,352.98

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Solution

The fourth proportional to 20,890.20, 31,318.85 and 10,352.98 is: 15,521.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.20 : 31,318.85 = 10,352.98 : x
  2. Step 2: Convert to fraction form
    20,890.20/31,318.85 = 10,352.98/x
  3. Step 3: Cross multiply
    20,890.20x = 31,318.85 × 10,352.98
  4. Step 4: Simplify right side
    20,890.20x = 324,243,427.67
  5. Step 5: Solve for x
    x = 324,243,427.67/20,890.20
  6. Step 6: Final answer
    x = 15,521.32

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1.5x scale

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.