Home / 20,728.64-28,606.08-11,297.81

Finding the Fourth Proportional to 20,728.64, 28,606.08 and 11,297.81

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Solution

The fourth proportional to 20,728.64, 28,606.08 and 11,297.81 is: 15,591.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.64 : 28,606.08 = 11,297.81 : x
  2. Step 2: Convert to fraction form
    20,728.64/28,606.08 = 11,297.81/x
  3. Step 3: Cross multiply
    20,728.64x = 28,606.08 × 11,297.81
  4. Step 4: Simplify right side
    20,728.64x = 323,185,913.65
  5. Step 5: Solve for x
    x = 323,185,913.65/20,728.64
  6. Step 6: Final answer
    x = 15,591.28

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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.