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Finding the Fourth Proportional to 20,785.52, 28,682.52 and 11,352.08

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Solution

The fourth proportional to 20,785.52, 28,682.52 and 11,352.08 is: 15,665.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.52 : 28,682.52 = 11,352.08 : x
  2. Step 2: Convert to fraction form
    20,785.52/28,682.52 = 11,352.08/x
  3. Step 3: Cross multiply
    20,785.52x = 28,682.52 × 11,352.08
  4. Step 4: Simplify right side
    20,785.52x = 325,606,261.64
  5. Step 5: Solve for x
    x = 325,606,261.64/20,785.52
  6. Step 6: Final answer
    x = 15,665.05

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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.