Home / 20,877.38-31,308.29-8,393.20

Finding the Fourth Proportional to 20,877.38, 31,308.29 and 8,393.20

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Solution

The fourth proportional to 20,877.38, 31,308.29 and 8,393.20 is: 12,586.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.38 : 31,308.29 = 8,393.20 : x
  2. Step 2: Convert to fraction form
    20,877.38/31,308.29 = 8,393.20/x
  3. Step 3: Cross multiply
    20,877.38x = 31,308.29 × 8,393.20
  4. Step 4: Simplify right side
    20,877.38x = 262,776,739.63
  5. Step 5: Solve for x
    x = 262,776,739.63/20,877.38
  6. Step 6: Final answer
    x = 12,586.67

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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.