Home / 12,678.38-19,020.91-4,781.01

Finding the Fourth Proportional to 12,678.38, 19,020.91 and 4,781.01

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Solution

The fourth proportional to 12,678.38, 19,020.91 and 4,781.01 is: 7,172.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.38 : 19,020.91 = 4,781.01 : x
  2. Step 2: Convert to fraction form
    12,678.38/19,020.91 = 4,781.01/x
  3. Step 3: Cross multiply
    12,678.38x = 19,020.91 × 4,781.01
  4. Step 4: Simplify right side
    12,678.38x = 90,939,160.92
  5. Step 5: Solve for x
    x = 90,939,160.92/12,678.38
  6. Step 6: Final answer
    x = 7,172.77

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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.