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Finding the Fourth Proportional to 15,185.88, 22,756.14 and 12,431.88

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Solution

The fourth proportional to 15,185.88, 22,756.14 and 12,431.88 is: 18,629.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,185.88 : 22,756.14 = 12,431.88 : x
  2. Step 2: Convert to fraction form
    15,185.88/22,756.14 = 12,431.88/x
  3. Step 3: Cross multiply
    15,185.88x = 22,756.14 × 12,431.88
  4. Step 4: Simplify right side
    15,185.88x = 282,901,601.74
  5. Step 5: Solve for x
    x = 282,901,601.74/15,185.88
  6. Step 6: Final answer
    x = 18,629.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.