Home / 20,933.16-28,886.08-11,978.61

Finding the Fourth Proportional to 20,933.16, 28,886.08 and 11,978.61

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Solution

The fourth proportional to 20,933.16, 28,886.08 and 11,978.61 is: 16,529.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.16 : 28,886.08 = 11,978.61 : x
  2. Step 2: Convert to fraction form
    20,933.16/28,886.08 = 11,978.61/x
  3. Step 3: Cross multiply
    20,933.16x = 28,886.08 × 11,978.61
  4. Step 4: Simplify right side
    20,933.16x = 346,015,086.75
  5. Step 5: Solve for x
    x = 346,015,086.75/20,933.16
  6. Step 6: Final answer
    x = 16,529.52

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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.