Home / 20,745.32-28,619.28-12,784.64

Finding the Fourth Proportional to 20,745.32, 28,619.28 and 12,784.64

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Solution

The fourth proportional to 20,745.32, 28,619.28 and 12,784.64 is: 17,637.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.32 : 28,619.28 = 12,784.64 : x
  2. Step 2: Convert to fraction form
    20,745.32/28,619.28 = 12,784.64/x
  3. Step 3: Cross multiply
    20,745.32x = 28,619.28 × 12,784.64
  4. Step 4: Simplify right side
    20,745.32x = 365,887,191.86
  5. Step 5: Solve for x
    x = 365,887,191.86/20,745.32
  6. Step 6: Final answer
    x = 17,637.10

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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.