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Finding the Fourth Proportional to 14,930.40, 20,603.44 and 8,215.40

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Solution

The fourth proportional to 14,930.40, 20,603.44 and 8,215.40 is: 11,336.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,930.40 : 20,603.44 = 8,215.40 : x
  2. Step 2: Convert to fraction form
    14,930.40/20,603.44 = 8,215.40/x
  3. Step 3: Cross multiply
    14,930.40x = 20,603.44 × 8,215.40
  4. Step 4: Simplify right side
    14,930.40x = 169,265,500.98
  5. Step 5: Solve for x
    x = 169,265,500.98/14,930.40
  6. Step 6: Final answer
    x = 11,336.97

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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.