Home / 20,556.68-28,368.24-11,125.28

Finding the Fourth Proportional to 20,556.68, 28,368.24 and 11,125.28

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Solution

The fourth proportional to 20,556.68, 28,368.24 and 11,125.28 is: 15,352.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.68 : 28,368.24 = 11,125.28 : x
  2. Step 2: Convert to fraction form
    20,556.68/28,368.24 = 11,125.28/x
  3. Step 3: Cross multiply
    20,556.68x = 28,368.24 × 11,125.28
  4. Step 4: Simplify right side
    20,556.68x = 315,604,613.11
  5. Step 5: Solve for x
    x = 315,604,613.11/20,556.68
  6. Step 6: Final answer
    x = 15,352.90

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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.