Home / 20,700.08-28,565.28-11,268.64

Finding the Fourth Proportional to 20,700.08, 28,565.28 and 11,268.64

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Solution

The fourth proportional to 20,700.08, 28,565.28 and 11,268.64 is: 15,550.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.08 : 28,565.28 = 11,268.64 : x
  2. Step 2: Convert to fraction form
    20,700.08/28,565.28 = 11,268.64/x
  3. Step 3: Cross multiply
    20,700.08x = 28,565.28 × 11,268.64
  4. Step 4: Simplify right side
    20,700.08x = 321,891,856.82
  5. Step 5: Solve for x
    x = 321,891,856.82/20,700.08
  6. Step 6: Final answer
    x = 15,550.27

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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.