Home / 21,193.40-31,790.10-5,612.60

Finding the Fourth Proportional to 21,193.40, 31,790.10 and 5,612.60

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Solution

The fourth proportional to 21,193.40, 31,790.10 and 5,612.60 is: 8,418.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,193.40 : 31,790.10 = 5,612.60 : x
  2. Step 2: Convert to fraction form
    21,193.40/31,790.10 = 5,612.60/x
  3. Step 3: Cross multiply
    21,193.40x = 31,790.10 × 5,612.60
  4. Step 4: Simplify right side
    21,193.40x = 178,425,115.26
  5. Step 5: Solve for x
    x = 178,425,115.26/21,193.40
  6. Step 6: Final answer
    x = 8,418.90

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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.