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Finding the Fourth Proportional to 18,803.81, 25,949.26 and 10,421.93

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Solution

The fourth proportional to 18,803.81, 25,949.26 and 10,421.93 is: 14,382.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.81 : 25,949.26 = 10,421.93 : x
  2. Step 2: Convert to fraction form
    18,803.81/25,949.26 = 10,421.93/x
  3. Step 3: Cross multiply
    18,803.81x = 25,949.26 × 10,421.93
  4. Step 4: Simplify right side
    18,803.81x = 270,441,449.17
  5. Step 5: Solve for x
    x = 270,441,449.17/18,803.81
  6. Step 6: Final answer
    x = 14,382.27

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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.