Home / 20,957.08-28,920.65-11,396.70

Finding the Fourth Proportional to 20,957.08, 28,920.65 and 11,396.70

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Solution

The fourth proportional to 20,957.08, 28,920.65 and 11,396.70 is: 15,727.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.08 : 28,920.65 = 11,396.70 : x
  2. Step 2: Convert to fraction form
    20,957.08/28,920.65 = 11,396.70/x
  3. Step 3: Cross multiply
    20,957.08x = 28,920.65 × 11,396.70
  4. Step 4: Simplify right side
    20,957.08x = 329,599,914.87
  5. Step 5: Solve for x
    x = 329,599,914.87/20,957.08
  6. Step 6: Final answer
    x = 15,727.38

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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.