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Finding the Fourth Proportional to 8,490.60, 12,707.10 and 7,453.80

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Solution

The fourth proportional to 8,490.60, 12,707.10 and 7,453.80 is: 11,155.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.60 : 12,707.10 = 7,453.80 : x
  2. Step 2: Convert to fraction form
    8,490.60/12,707.10 = 7,453.80/x
  3. Step 3: Cross multiply
    8,490.60x = 12,707.10 × 7,453.80
  4. Step 4: Simplify right side
    8,490.60x = 94,716,181.98
  5. Step 5: Solve for x
    x = 94,716,181.98/8,490.60
  6. Step 6: Final answer
    x = 11,155.42

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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.