Home / 20,556.80-28,368.41-11,125.35

Finding the Fourth Proportional to 20,556.80, 28,368.41 and 11,125.35

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Solution

The fourth proportional to 20,556.80, 28,368.41 and 11,125.35 is: 15,353.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.80 : 28,368.41 = 11,125.35 : x
  2. Step 2: Convert to fraction form
    20,556.80/28,368.41 = 11,125.35/x
  3. Step 3: Cross multiply
    20,556.80x = 28,368.41 × 11,125.35
  4. Step 4: Simplify right side
    20,556.80x = 315,608,434.57
  5. Step 5: Solve for x
    x = 315,608,434.57/20,556.80
  6. Step 6: Final answer
    x = 15,353.00

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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.