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Finding the Fourth Proportional to 18,151.63, 25,054.47 and 10,981.57

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Solution

The fourth proportional to 18,151.63, 25,054.47 and 10,981.57 is: 15,157.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,151.63 : 25,054.47 = 10,981.57 : x
  2. Step 2: Convert to fraction form
    18,151.63/25,054.47 = 10,981.57/x
  3. Step 3: Cross multiply
    18,151.63x = 25,054.47 × 10,981.57
  4. Step 4: Simplify right side
    18,151.63x = 275,137,416.12
  5. Step 5: Solve for x
    x = 275,137,416.12/18,151.63
  6. Step 6: Final answer
    x = 15,157.73

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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.