Home / 12,690.69-19,040.55-5,670.06

Finding the Fourth Proportional to 12,690.69, 19,040.55 and 5,670.06

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Solution

The fourth proportional to 12,690.69, 19,040.55 and 5,670.06 is: 8,507.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.69 : 19,040.55 = 5,670.06 : x
  2. Step 2: Convert to fraction form
    12,690.69/19,040.55 = 5,670.06/x
  3. Step 3: Cross multiply
    12,690.69x = 19,040.55 × 5,670.06
  4. Step 4: Simplify right side
    12,690.69x = 107,961,060.93
  5. Step 5: Solve for x
    x = 107,961,060.93/12,690.69
  6. Step 6: Final answer
    x = 8,507.11

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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.