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Finding the Fourth Proportional to 18,165.10, 25,079 and 14,403.46

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Solution

The fourth proportional to 18,165.10, 25,079 and 14,403.46 is: 19,885.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,165.10 : 25,079 = 14,403.46 : x
  2. Step 2: Convert to fraction form
    18,165.10/25,079 = 14,403.46/x
  3. Step 3: Cross multiply
    18,165.10x = 25,079 × 14,403.46
  4. Step 4: Simplify right side
    18,165.10x = 361,224,373.34
  5. Step 5: Solve for x
    x = 361,224,373.34/18,165.10
  6. Step 6: Final answer
    x = 19,885.63

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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.