Home / 20,898.60-31,347.90-12,604.20

Finding the Fourth Proportional to 20,898.60, 31,347.90 and 12,604.20

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Solution

The fourth proportional to 20,898.60, 31,347.90 and 12,604.20 is: 18,906.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.60 : 31,347.90 = 12,604.20 : x
  2. Step 2: Convert to fraction form
    20,898.60/31,347.90 = 12,604.20/x
  3. Step 3: Cross multiply
    20,898.60x = 31,347.90 × 12,604.20
  4. Step 4: Simplify right side
    20,898.60x = 395,115,201.18
  5. Step 5: Solve for x
    x = 395,115,201.18/20,898.60
  6. Step 6: Final answer
    x = 18,906.30

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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.