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Finding the Fourth Proportional to 16,720, 25,081.52 and 4,408

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Solution

The fourth proportional to 16,720, 25,081.52 and 4,408 is: 6,612.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,720 : 25,081.52 = 4,408 : x
  2. Step 2: Convert to fraction form
    16,720/25,081.52 = 4,408/x
  3. Step 3: Cross multiply
    16,720x = 25,081.52 × 4,408
  4. Step 4: Simplify right side
    16,720x = 110,559,340.16
  5. Step 5: Solve for x
    x = 110,559,340.16/16,720
  6. Step 6: Final answer
    x = 6,612.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.