Home / 20,280.15-27,986.82-11,782.98

Finding the Fourth Proportional to 20,280.15, 27,986.82 and 11,782.98

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Solution

The fourth proportional to 20,280.15, 27,986.82 and 11,782.98 is: 16,260.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.15 : 27,986.82 = 11,782.98 : x
  2. Step 2: Convert to fraction form
    20,280.15/27,986.82 = 11,782.98/x
  3. Step 3: Cross multiply
    20,280.15x = 27,986.82 × 11,782.98
  4. Step 4: Simplify right side
    20,280.15x = 329,768,140.32
  5. Step 5: Solve for x
    x = 329,768,140.32/20,280.15
  6. Step 6: Final answer
    x = 16,260.64

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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.