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Finding the Fourth Proportional to 12,758.08, 18,998.48 and 12,712

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Solution

The fourth proportional to 12,758.08, 18,998.48 and 12,712 is: 18,929.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,758.08 : 18,998.48 = 12,712 : x
  2. Step 2: Convert to fraction form
    12,758.08/18,998.48 = 12,712/x
  3. Step 3: Cross multiply
    12,758.08x = 18,998.48 × 12,712
  4. Step 4: Simplify right side
    12,758.08x = 241,508,677.76
  5. Step 5: Solve for x
    x = 241,508,677.76/12,758.08
  6. Step 6: Final answer
    x = 18,929.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.