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Finding the Fourth Proportional to 14,269.20, 21,405.40 and 4,408.40

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Solution

The fourth proportional to 14,269.20, 21,405.40 and 4,408.40 is: 6,613.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,269.20 : 21,405.40 = 4,408.40 : x
  2. Step 2: Convert to fraction form
    14,269.20/21,405.40 = 4,408.40/x
  3. Step 3: Cross multiply
    14,269.20x = 21,405.40 × 4,408.40
  4. Step 4: Simplify right side
    14,269.20x = 94,363,565.36
  5. Step 5: Solve for x
    x = 94,363,565.36/14,269.20
  6. Step 6: Final answer
    x = 6,613.09

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1.5x scale

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.