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Finding the Fourth Proportional to 18,698.88, 25,803.84 and 10,315.20

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Solution

The fourth proportional to 18,698.88, 25,803.84 and 10,315.20 is: 14,234.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.88 : 25,803.84 = 10,315.20 : x
  2. Step 2: Convert to fraction form
    18,698.88/25,803.84 = 10,315.20/x
  3. Step 3: Cross multiply
    18,698.88x = 25,803.84 × 10,315.20
  4. Step 4: Simplify right side
    18,698.88x = 266,171,770.37
  5. Step 5: Solve for x
    x = 266,171,770.37/18,698.88
  6. Step 6: Final answer
    x = 14,234.64

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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.