Home / 20,860.49-28,783.16-11,910.90

Finding the Fourth Proportional to 20,860.49, 28,783.16 and 11,910.90

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Solution

The fourth proportional to 20,860.49, 28,783.16 and 11,910.90 is: 16,434.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.49 : 28,783.16 = 11,910.90 : x
  2. Step 2: Convert to fraction form
    20,860.49/28,783.16 = 11,910.90/x
  3. Step 3: Cross multiply
    20,860.49x = 28,783.16 × 11,910.90
  4. Step 4: Simplify right side
    20,860.49x = 342,833,280.89
  5. Step 5: Solve for x
    x = 342,833,280.89/20,860.49
  6. Step 6: Final answer
    x = 16,434.58

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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.