Home / 20,707.39-28,577.51-11,751.49

Finding the Fourth Proportional to 20,707.39, 28,577.51 and 11,751.49

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Solution

The fourth proportional to 20,707.39, 28,577.51 and 11,751.49 is: 16,217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.39 : 28,577.51 = 11,751.49 : x
  2. Step 2: Convert to fraction form
    20,707.39/28,577.51 = 11,751.49/x
  3. Step 3: Cross multiply
    20,707.39x = 28,577.51 × 11,751.49
  4. Step 4: Simplify right side
    20,707.39x = 335,828,322.99
  5. Step 5: Solve for x
    x = 335,828,322.99/20,707.39
  6. Step 6: Final answer
    x = 16,217.80

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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.