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Finding the Fourth Proportional to 18,814.95, 25,964.48 and 10,431.45

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Solution

The fourth proportional to 18,814.95, 25,964.48 and 10,431.45 is: 14,395.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,814.95 : 25,964.48 = 10,431.45 : x
  2. Step 2: Convert to fraction form
    18,814.95/25,964.48 = 10,431.45/x
  3. Step 3: Cross multiply
    18,814.95x = 25,964.48 × 10,431.45
  4. Step 4: Simplify right side
    18,814.95x = 270,847,200.97
  5. Step 5: Solve for x
    x = 270,847,200.97/18,814.95
  6. Step 6: Final answer
    x = 14,395.32

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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.