Home / 20,556.78-28,368.30-11,125.32

Finding the Fourth Proportional to 20,556.78, 28,368.30 and 11,125.32

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Solution

The fourth proportional to 20,556.78, 28,368.30 and 11,125.32 is: 15,352.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.78 : 28,368.30 = 11,125.32 : x
  2. Step 2: Convert to fraction form
    20,556.78/28,368.30 = 11,125.32/x
  3. Step 3: Cross multiply
    20,556.78x = 28,368.30 × 11,125.32
  4. Step 4: Simplify right side
    20,556.78x = 315,606,415.36
  5. Step 5: Solve for x
    x = 315,606,415.36/20,556.78
  6. Step 6: Final answer
    x = 15,352.91

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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.