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Finding the Fourth Proportional to 12,457.54, 18,665.17 and 7,516.80

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Solution

The fourth proportional to 12,457.54, 18,665.17 and 7,516.80 is: 11,262.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.54 : 18,665.17 = 7,516.80 : x
  2. Step 2: Convert to fraction form
    12,457.54/18,665.17 = 7,516.80/x
  3. Step 3: Cross multiply
    12,457.54x = 18,665.17 × 7,516.80
  4. Step 4: Simplify right side
    12,457.54x = 140,302,331.06
  5. Step 5: Solve for x
    x = 140,302,331.06/12,457.54
  6. Step 6: Final answer
    x = 11,262.44

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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.