Home / 20,688-28,550.91-11,736.27

Finding the Fourth Proportional to 20,688, 28,550.91 and 11,736.27

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Solution

The fourth proportional to 20,688, 28,550.91 and 11,736.27 is: 16,196.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688 : 28,550.91 = 11,736.27 : x
  2. Step 2: Convert to fraction form
    20,688/28,550.91 = 11,736.27/x
  3. Step 3: Cross multiply
    20,688x = 28,550.91 × 11,736.27
  4. Step 4: Simplify right side
    20,688x = 335,081,188.51
  5. Step 5: Solve for x
    x = 335,081,188.51/20,688
  6. Step 6: Final answer
    x = 16,196.89

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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.