Home / 20,746.32-28,620.66-12,785.64

Finding the Fourth Proportional to 20,746.32, 28,620.66 and 12,785.64

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Solution

The fourth proportional to 20,746.32, 28,620.66 and 12,785.64 is: 17,638.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,746.32 : 28,620.66 = 12,785.64 : x
  2. Step 2: Convert to fraction form
    20,746.32/28,620.66 = 12,785.64/x
  3. Step 3: Cross multiply
    20,746.32x = 28,620.66 × 12,785.64
  4. Step 4: Simplify right side
    20,746.32x = 365,933,455.32
  5. Step 5: Solve for x
    x = 365,933,455.32/20,746.32
  6. Step 6: Final answer
    x = 17,638.48

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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.