Home / 20,729.12-28,605.28-11,297.72

Finding the Fourth Proportional to 20,729.12, 28,605.28 and 11,297.72

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Solution

The fourth proportional to 20,729.12, 28,605.28 and 11,297.72 is: 15,590.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.12 : 28,605.28 = 11,297.72 : x
  2. Step 2: Convert to fraction form
    20,729.12/28,605.28 = 11,297.72/x
  3. Step 3: Cross multiply
    20,729.12x = 28,605.28 × 11,297.72
  4. Step 4: Simplify right side
    20,729.12x = 323,174,443.96
  5. Step 5: Solve for x
    x = 323,174,443.96/20,729.12
  6. Step 6: Final answer
    x = 15,590.36

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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.