Home / 20,900.07-31,358.12-12,586.03

Finding the Fourth Proportional to 20,900.07, 31,358.12 and 12,586.03

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Solution

The fourth proportional to 20,900.07, 31,358.12 and 12,586.03 is: 18,883.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.07 : 31,358.12 = 12,586.03 : x
  2. Step 2: Convert to fraction form
    20,900.07/31,358.12 = 12,586.03/x
  3. Step 3: Cross multiply
    20,900.07x = 31,358.12 × 12,586.03
  4. Step 4: Simplify right side
    20,900.07x = 394,674,215.33
  5. Step 5: Solve for x
    x = 394,674,215.33/20,900.07
  6. Step 6: Final answer
    x = 18,883.87

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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.