Home / 20,509.12-28,302.78-11,556.82

Finding the Fourth Proportional to 20,509.12, 28,302.78 and 11,556.82

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Solution

The fourth proportional to 20,509.12, 28,302.78 and 11,556.82 is: 15,948.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.12 : 28,302.78 = 11,556.82 : x
  2. Step 2: Convert to fraction form
    20,509.12/28,302.78 = 11,556.82/x
  3. Step 3: Cross multiply
    20,509.12x = 28,302.78 × 11,556.82
  4. Step 4: Simplify right side
    20,509.12x = 327,090,133.96
  5. Step 5: Solve for x
    x = 327,090,133.96/20,509.12
  6. Step 6: Final answer
    x = 15,948.52

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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.