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Finding the Fourth Proportional to 18,129.86, 25,019.06 and 10,172.10

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Solution

The fourth proportional to 18,129.86, 25,019.06 and 10,172.10 is: 14,037.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.86 : 25,019.06 = 10,172.10 : x
  2. Step 2: Convert to fraction form
    18,129.86/25,019.06 = 10,172.10/x
  3. Step 3: Cross multiply
    18,129.86x = 25,019.06 × 10,172.10
  4. Step 4: Simplify right side
    18,129.86x = 254,496,380.23
  5. Step 5: Solve for x
    x = 254,496,380.23/18,129.86
  6. Step 6: Final answer
    x = 14,037.42

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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.