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Finding the Fourth Proportional to 18,485.94, 25,515.12 and 15,497.04

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Solution

The fourth proportional to 18,485.94, 25,515.12 and 15,497.04 is: 21,389.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,485.94 : 25,515.12 = 15,497.04 : x
  2. Step 2: Convert to fraction form
    18,485.94/25,515.12 = 15,497.04/x
  3. Step 3: Cross multiply
    18,485.94x = 25,515.12 × 15,497.04
  4. Step 4: Simplify right side
    18,485.94x = 395,408,835.24
  5. Step 5: Solve for x
    x = 395,408,835.24/18,485.94
  6. Step 6: Final answer
    x = 21,389.71

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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.