Home / 20,638.08-28,480.70-11,206.64

Finding the Fourth Proportional to 20,638.08, 28,480.70 and 11,206.64

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Solution

The fourth proportional to 20,638.08, 28,480.70 and 11,206.64 is: 15,465.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.08 : 28,480.70 = 11,206.64 : x
  2. Step 2: Convert to fraction form
    20,638.08/28,480.70 = 11,206.64/x
  3. Step 3: Cross multiply
    20,638.08x = 28,480.70 × 11,206.64
  4. Step 4: Simplify right side
    20,638.08x = 319,172,951.85
  5. Step 5: Solve for x
    x = 319,172,951.85/20,638.08
  6. Step 6: Final answer
    x = 15,465.24

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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.