Home / 20,965.20-28,929.60-11,533.20

Finding the Fourth Proportional to 20,965.20, 28,929.60 and 11,533.20

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Solution

The fourth proportional to 20,965.20, 28,929.60 and 11,533.20 is: 15,914.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.20 : 28,929.60 = 11,533.20 : x
  2. Step 2: Convert to fraction form
    20,965.20/28,929.60 = 11,533.20/x
  3. Step 3: Cross multiply
    20,965.20x = 28,929.60 × 11,533.20
  4. Step 4: Simplify right side
    20,965.20x = 333,650,862.72
  5. Step 5: Solve for x
    x = 333,650,862.72/20,965.20
  6. Step 6: Final answer
    x = 15,914.51

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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.