Home / 20,556.83-28,368.43-11,125.40

Finding the Fourth Proportional to 20,556.83, 28,368.43 and 11,125.40

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Solution

The fourth proportional to 20,556.83, 28,368.43 and 11,125.40 is: 15,353.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.83 : 28,368.43 = 11,125.40 : x
  2. Step 2: Convert to fraction form
    20,556.83/28,368.43 = 11,125.40/x
  3. Step 3: Cross multiply
    20,556.83x = 28,368.43 × 11,125.40
  4. Step 4: Simplify right side
    20,556.83x = 315,609,961.47
  5. Step 5: Solve for x
    x = 315,609,961.47/20,556.83
  6. Step 6: Final answer
    x = 15,353.04

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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.