Home / 20,866.84-28,796.94-11,435.32

Finding the Fourth Proportional to 20,866.84, 28,796.94 and 11,435.32

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Solution

The fourth proportional to 20,866.84, 28,796.94 and 11,435.32 is: 15,781.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,866.84 : 28,796.94 = 11,435.32 : x
  2. Step 2: Convert to fraction form
    20,866.84/28,796.94 = 11,435.32/x
  3. Step 3: Cross multiply
    20,866.84x = 28,796.94 × 11,435.32
  4. Step 4: Simplify right side
    20,866.84x = 329,302,223.92
  5. Step 5: Solve for x
    x = 329,302,223.92/20,866.84
  6. Step 6: Final answer
    x = 15,781.13

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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.