Home / 20,516.78-28,307.94-12,556.10

Finding the Fourth Proportional to 20,516.78, 28,307.94 and 12,556.10

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Solution

The fourth proportional to 20,516.78, 28,307.94 and 12,556.10 is: 17,324.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.78 : 28,307.94 = 12,556.10 : x
  2. Step 2: Convert to fraction form
    20,516.78/28,307.94 = 12,556.10/x
  3. Step 3: Cross multiply
    20,516.78x = 28,307.94 × 12,556.10
  4. Step 4: Simplify right side
    20,516.78x = 355,437,325.43
  5. Step 5: Solve for x
    x = 355,437,325.43/20,516.78
  6. Step 6: Final answer
    x = 17,324.23

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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.