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Finding the Fourth Proportional to 12,412.60, 18,619.80 and 7,471.60

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Solution

The fourth proportional to 12,412.60, 18,619.80 and 7,471.60 is: 11,207.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,412.60 : 18,619.80 = 7,471.60 : x
  2. Step 2: Convert to fraction form
    12,412.60/18,619.80 = 7,471.60/x
  3. Step 3: Cross multiply
    12,412.60x = 18,619.80 × 7,471.60
  4. Step 4: Simplify right side
    12,412.60x = 139,119,697.68
  5. Step 5: Solve for x
    x = 139,119,697.68/12,412.60
  6. Step 6: Final answer
    x = 11,207.94

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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.