Home / 20,986.52-28,961.43-11,555.11

Finding the Fourth Proportional to 20,986.52, 28,961.43 and 11,555.11

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Solution

The fourth proportional to 20,986.52, 28,961.43 and 11,555.11 is: 15,946.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.52 : 28,961.43 = 11,555.11 : x
  2. Step 2: Convert to fraction form
    20,986.52/28,961.43 = 11,555.11/x
  3. Step 3: Cross multiply
    20,986.52x = 28,961.43 × 11,555.11
  4. Step 4: Simplify right side
    20,986.52x = 334,652,364.60
  5. Step 5: Solve for x
    x = 334,652,364.60/20,986.52
  6. Step 6: Final answer
    x = 15,946.06

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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.