Home / 20,948.16-28,908.80-11,516.64

Finding the Fourth Proportional to 20,948.16, 28,908.80 and 11,516.64

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Solution

The fourth proportional to 20,948.16, 28,908.80 and 11,516.64 is: 15,893.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.16 : 28,908.80 = 11,516.64 : x
  2. Step 2: Convert to fraction form
    20,948.16/28,908.80 = 11,516.64/x
  3. Step 3: Cross multiply
    20,948.16x = 28,908.80 × 11,516.64
  4. Step 4: Simplify right side
    20,948.16x = 332,932,242.43
  5. Step 5: Solve for x
    x = 332,932,242.43/20,948.16
  6. Step 6: Final answer
    x = 15,893.15

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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.