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Finding the Fourth Proportional to 18,479.70, 25,498.98 and 11,408.40

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Solution

The fourth proportional to 18,479.70, 25,498.98 and 11,408.40 is: 15,741.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.70 : 25,498.98 = 11,408.40 : x
  2. Step 2: Convert to fraction form
    18,479.70/25,498.98 = 11,408.40/x
  3. Step 3: Cross multiply
    18,479.70x = 25,498.98 × 11,408.40
  4. Step 4: Simplify right side
    18,479.70x = 290,902,563.43
  5. Step 5: Solve for x
    x = 290,902,563.43/18,479.70
  6. Step 6: Final answer
    x = 15,741.74

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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.