Home / 20,916.20-31,374.30-9,830.54

Finding the Fourth Proportional to 20,916.20, 31,374.30 and 9,830.54

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Solution

The fourth proportional to 20,916.20, 31,374.30 and 9,830.54 is: 14,745.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.20 : 31,374.30 = 9,830.54 : x
  2. Step 2: Convert to fraction form
    20,916.20/31,374.30 = 9,830.54/x
  3. Step 3: Cross multiply
    20,916.20x = 31,374.30 × 9,830.54
  4. Step 4: Simplify right side
    20,916.20x = 308,426,311.12
  5. Step 5: Solve for x
    x = 308,426,311.12/20,916.20
  6. Step 6: Final answer
    x = 14,745.81

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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.