Home / 20,932.32-28,891.60-11,985

Finding the Fourth Proportional to 20,932.32, 28,891.60 and 11,985

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Solution

The fourth proportional to 20,932.32, 28,891.60 and 11,985 is: 16,542.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.32 : 28,891.60 = 11,985 : x
  2. Step 2: Convert to fraction form
    20,932.32/28,891.60 = 11,985/x
  3. Step 3: Cross multiply
    20,932.32x = 28,891.60 × 11,985
  4. Step 4: Simplify right side
    20,932.32x = 346,265,826
  5. Step 5: Solve for x
    x = 346,265,826/20,932.32
  6. Step 6: Final answer
    x = 16,542.16

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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.