Home / 21,960.55-30,305.55-11,888.99

Finding the Fourth Proportional to 21,960.55, 30,305.55 and 11,888.99

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Solution

The fourth proportional to 21,960.55, 30,305.55 and 11,888.99 is: 16,406.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.55 : 30,305.55 = 11,888.99 : x
  2. Step 2: Convert to fraction form
    21,960.55/30,305.55 = 11,888.99/x
  3. Step 3: Cross multiply
    21,960.55x = 30,305.55 × 11,888.99
  4. Step 4: Simplify right side
    21,960.55x = 360,302,387.60
  5. Step 5: Solve for x
    x = 360,302,387.60/21,960.55
  6. Step 6: Final answer
    x = 16,406.80

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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.