Home / 19,986.40-29,942.70-11,670.40

Finding the Fourth Proportional to 19,986.40, 29,942.70 and 11,670.40

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Solution

The fourth proportional to 19,986.40, 29,942.70 and 11,670.40 is: 17,484.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986.40 : 29,942.70 = 11,670.40 : x
  2. Step 2: Convert to fraction form
    19,986.40/29,942.70 = 11,670.40/x
  3. Step 3: Cross multiply
    19,986.40x = 29,942.70 × 11,670.40
  4. Step 4: Simplify right side
    19,986.40x = 349,443,286.08
  5. Step 5: Solve for x
    x = 349,443,286.08/19,986.40
  6. Step 6: Final answer
    x = 17,484.05

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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.