Home / 20,297.56-28,012.16-11,686.40

Finding the Fourth Proportional to 20,297.56, 28,012.16 and 11,686.40

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Solution

The fourth proportional to 20,297.56, 28,012.16 and 11,686.40 is: 16,128.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,297.56 : 28,012.16 = 11,686.40 : x
  2. Step 2: Convert to fraction form
    20,297.56/28,012.16 = 11,686.40/x
  3. Step 3: Cross multiply
    20,297.56x = 28,012.16 × 11,686.40
  4. Step 4: Simplify right side
    20,297.56x = 327,361,306.62
  5. Step 5: Solve for x
    x = 327,361,306.62/20,297.56
  6. Step 6: Final answer
    x = 16,128.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.