Home / 20,905.60-31,358.01-8,425.29

Finding the Fourth Proportional to 20,905.60, 31,358.01 and 8,425.29

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Solution

The fourth proportional to 20,905.60, 31,358.01 and 8,425.29 is: 12,637.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.60 : 31,358.01 = 8,425.29 : x
  2. Step 2: Convert to fraction form
    20,905.60/31,358.01 = 8,425.29/x
  3. Step 3: Cross multiply
    20,905.60x = 31,358.01 × 8,425.29
  4. Step 4: Simplify right side
    20,905.60x = 264,200,328.07
  5. Step 5: Solve for x
    x = 264,200,328.07/20,905.60
  6. Step 6: Final answer
    x = 12,637.78

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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.