Home / 20,707.50-28,574.88-11,755.18

Finding the Fourth Proportional to 20,707.50, 28,574.88 and 11,755.18

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Solution

The fourth proportional to 20,707.50, 28,574.88 and 11,755.18 is: 16,221.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.50 : 28,574.88 = 11,755.18 : x
  2. Step 2: Convert to fraction form
    20,707.50/28,574.88 = 11,755.18/x
  3. Step 3: Cross multiply
    20,707.50x = 28,574.88 × 11,755.18
  4. Step 4: Simplify right side
    20,707.50x = 335,902,857.88
  5. Step 5: Solve for x
    x = 335,902,857.88/20,707.50
  6. Step 6: Final answer
    x = 16,221.31

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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.