Home / 19,890.55-29,831.11-7,416.43

Finding the Fourth Proportional to 19,890.55, 29,831.11 and 7,416.43

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Solution

The fourth proportional to 19,890.55, 29,831.11 and 7,416.43 is: 11,122.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.55 : 29,831.11 = 7,416.43 : x
  2. Step 2: Convert to fraction form
    19,890.55/29,831.11 = 7,416.43/x
  3. Step 3: Cross multiply
    19,890.55x = 29,831.11 × 7,416.43
  4. Step 4: Simplify right side
    19,890.55x = 221,240,339.14
  5. Step 5: Solve for x
    x = 221,240,339.14/19,890.55
  6. Step 6: Final answer
    x = 11,122.89

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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.