Home / 20,893.60-31,340.40-12,599.20

Finding the Fourth Proportional to 20,893.60, 31,340.40 and 12,599.20

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Solution

The fourth proportional to 20,893.60, 31,340.40 and 12,599.20 is: 18,898.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.60 : 31,340.40 = 12,599.20 : x
  2. Step 2: Convert to fraction form
    20,893.60/31,340.40 = 12,599.20/x
  3. Step 3: Cross multiply
    20,893.60x = 31,340.40 × 12,599.20
  4. Step 4: Simplify right side
    20,893.60x = 394,863,967.68
  5. Step 5: Solve for x
    x = 394,863,967.68/20,893.60
  6. Step 6: Final answer
    x = 18,898.80

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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.