Home / 20,863.08-28,783.86-11,904.12

Finding the Fourth Proportional to 20,863.08, 28,783.86 and 11,904.12

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Solution

The fourth proportional to 20,863.08, 28,783.86 and 11,904.12 is: 16,423.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.08 : 28,783.86 = 11,904.12 : x
  2. Step 2: Convert to fraction form
    20,863.08/28,783.86 = 11,904.12/x
  3. Step 3: Cross multiply
    20,863.08x = 28,783.86 × 11,904.12
  4. Step 4: Simplify right side
    20,863.08x = 342,646,523.50
  5. Step 5: Solve for x
    x = 342,646,523.50/20,863.08
  6. Step 6: Final answer
    x = 16,423.58

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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.