Home / 20,980.72-28,954.68-11,551.36

Finding the Fourth Proportional to 20,980.72, 28,954.68 and 11,551.36

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Solution

The fourth proportional to 20,980.72, 28,954.68 and 11,551.36 is: 15,941.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.72 : 28,954.68 = 11,551.36 : x
  2. Step 2: Convert to fraction form
    20,980.72/28,954.68 = 11,551.36/x
  3. Step 3: Cross multiply
    20,980.72x = 28,954.68 × 11,551.36
  4. Step 4: Simplify right side
    20,980.72x = 334,465,932.36
  5. Step 5: Solve for x
    x = 334,465,932.36/20,980.72
  6. Step 6: Final answer
    x = 15,941.59

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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.