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Finding the Fourth Proportional to 14,979.40, 22,485.30 and 8,418.40

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Solution

The fourth proportional to 14,979.40, 22,485.30 and 8,418.40 is: 12,636.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,979.40 : 22,485.30 = 8,418.40 : x
  2. Step 2: Convert to fraction form
    14,979.40/22,485.30 = 8,418.40/x
  3. Step 3: Cross multiply
    14,979.40x = 22,485.30 × 8,418.40
  4. Step 4: Simplify right side
    14,979.40x = 189,290,249.52
  5. Step 5: Solve for x
    x = 189,290,249.52/14,979.40
  6. Step 6: Final answer
    x = 12,636.70

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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.