Home / 20,852.10-28,775.52-11,420.46

Finding the Fourth Proportional to 20,852.10, 28,775.52 and 11,420.46

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Solution

The fourth proportional to 20,852.10, 28,775.52 and 11,420.46 is: 15,760.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.10 : 28,775.52 = 11,420.46 : x
  2. Step 2: Convert to fraction form
    20,852.10/28,775.52 = 11,420.46/x
  3. Step 3: Cross multiply
    20,852.10x = 28,775.52 × 11,420.46
  4. Step 4: Simplify right side
    20,852.10x = 328,629,675.14
  5. Step 5: Solve for x
    x = 328,629,675.14/20,852.10
  6. Step 6: Final answer
    x = 15,760.03

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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.