Home / 20,485.64-28,272.30-12,533.15

Finding the Fourth Proportional to 20,485.64, 28,272.30 and 12,533.15

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Solution

The fourth proportional to 20,485.64, 28,272.30 and 12,533.15 is: 17,297.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.64 : 28,272.30 = 12,533.15 : x
  2. Step 2: Convert to fraction form
    20,485.64/28,272.30 = 12,533.15/x
  3. Step 3: Cross multiply
    20,485.64x = 28,272.30 × 12,533.15
  4. Step 4: Simplify right side
    20,485.64x = 354,340,976.75
  5. Step 5: Solve for x
    x = 354,340,976.75/20,485.64
  6. Step 6: Final answer
    x = 17,297.04

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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.