Home / 20,993.42-28,970.92-11,561.99

Finding the Fourth Proportional to 20,993.42, 28,970.92 and 11,561.99

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Solution

The fourth proportional to 20,993.42, 28,970.92 and 11,561.99 is: 15,955.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.42 : 28,970.92 = 11,561.99 : x
  2. Step 2: Convert to fraction form
    20,993.42/28,970.92 = 11,561.99/x
  3. Step 3: Cross multiply
    20,993.42x = 28,970.92 × 11,561.99
  4. Step 4: Simplify right side
    20,993.42x = 334,961,342.48
  5. Step 5: Solve for x
    x = 334,961,342.48/20,993.42
  6. Step 6: Final answer
    x = 15,955.54

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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.