Home / 20,905.56-31,354.56-8,425.08

Finding the Fourth Proportional to 20,905.56, 31,354.56 and 8,425.08

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Solution

The fourth proportional to 20,905.56, 31,354.56 and 8,425.08 is: 12,636.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.56 : 31,354.56 = 8,425.08 : x
  2. Step 2: Convert to fraction form
    20,905.56/31,354.56 = 8,425.08/x
  3. Step 3: Cross multiply
    20,905.56x = 31,354.56 × 8,425.08
  4. Step 4: Simplify right side
    20,905.56x = 264,164,676.36
  5. Step 5: Solve for x
    x = 264,164,676.36/20,905.56
  6. Step 6: Final answer
    x = 12,636.10

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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.