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Finding the Fourth Proportional to 12,617.47, 18,919.98 and 7,354.40

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Solution

The fourth proportional to 12,617.47, 18,919.98 and 7,354.40 is: 11,027.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,617.47 : 18,919.98 = 7,354.40 : x
  2. Step 2: Convert to fraction form
    12,617.47/18,919.98 = 7,354.40/x
  3. Step 3: Cross multiply
    12,617.47x = 18,919.98 × 7,354.40
  4. Step 4: Simplify right side
    12,617.47x = 139,145,006.31
  5. Step 5: Solve for x
    x = 139,145,006.31/12,617.47
  6. Step 6: Final answer
    x = 11,027.96

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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.