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Finding the Fourth Proportional to 18,804.60, 25,950.87 and 10,421.10

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Solution

The fourth proportional to 18,804.60, 25,950.87 and 10,421.10 is: 14,381.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,804.60 : 25,950.87 = 10,421.10 : x
  2. Step 2: Convert to fraction form
    18,804.60/25,950.87 = 10,421.10/x
  3. Step 3: Cross multiply
    18,804.60x = 25,950.87 × 10,421.10
  4. Step 4: Simplify right side
    18,804.60x = 270,436,611.36
  5. Step 5: Solve for x
    x = 270,436,611.36/18,804.60
  6. Step 6: Final answer
    x = 14,381.41

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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.