Home / 20,820.42-31,238.46-12,506.22

Finding the Fourth Proportional to 20,820.42, 31,238.46 and 12,506.22

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Solution

The fourth proportional to 20,820.42, 31,238.46 and 12,506.22 is: 18,764.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,820.42 : 31,238.46 = 12,506.22 : x
  2. Step 2: Convert to fraction form
    20,820.42/31,238.46 = 12,506.22/x
  3. Step 3: Cross multiply
    20,820.42x = 31,238.46 × 12,506.22
  4. Step 4: Simplify right side
    20,820.42x = 390,675,053.22
  5. Step 5: Solve for x
    x = 390,675,053.22/20,820.42
  6. Step 6: Final answer
    x = 18,764.03

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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.