Home / 20,690.49-28,551.64-11,615.18

Finding the Fourth Proportional to 20,690.49, 28,551.64 and 11,615.18

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Solution

The fourth proportional to 20,690.49, 28,551.64 and 11,615.18 is: 16,028.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.49 : 28,551.64 = 11,615.18 : x
  2. Step 2: Convert to fraction form
    20,690.49/28,551.64 = 11,615.18/x
  3. Step 3: Cross multiply
    20,690.49x = 28,551.64 × 11,615.18
  4. Step 4: Simplify right side
    20,690.49x = 331,632,379.82
  5. Step 5: Solve for x
    x = 331,632,379.82/20,690.49
  6. Step 6: Final answer
    x = 16,028.25

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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.