Home / 20,699.56-28,569.33-11,747.90

Finding the Fourth Proportional to 20,699.56, 28,569.33 and 11,747.90

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Solution

The fourth proportional to 20,699.56, 28,569.33 and 11,747.90 is: 16,214.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.56 : 28,569.33 = 11,747.90 : x
  2. Step 2: Convert to fraction form
    20,699.56/28,569.33 = 11,747.90/x
  3. Step 3: Cross multiply
    20,699.56x = 28,569.33 × 11,747.90
  4. Step 4: Simplify right side
    20,699.56x = 335,629,430.32
  5. Step 5: Solve for x
    x = 335,629,430.32/20,699.56
  6. Step 6: Final answer
    x = 16,214.33

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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.