Home / 20,749.10-31,125.58-8,266.10

Finding the Fourth Proportional to 20,749.10, 31,125.58 and 8,266.10

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Solution

The fourth proportional to 20,749.10, 31,125.58 and 8,266.10 is: 12,399.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.10 : 31,125.58 = 8,266.10 : x
  2. Step 2: Convert to fraction form
    20,749.10/31,125.58 = 8,266.10/x
  3. Step 3: Cross multiply
    20,749.10x = 31,125.58 × 8,266.10
  4. Step 4: Simplify right side
    20,749.10x = 257,286,980.54
  5. Step 5: Solve for x
    x = 257,286,980.54/20,749.10
  6. Step 6: Final answer
    x = 12,399.91

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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.