Home / 21,615.65-29,831.33-12,185.09

Finding the Fourth Proportional to 21,615.65, 29,831.33 and 12,185.09

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Solution

The fourth proportional to 21,615.65, 29,831.33 and 12,185.09 is: 16,816.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,615.65 : 29,831.33 = 12,185.09 : x
  2. Step 2: Convert to fraction form
    21,615.65/29,831.33 = 12,185.09/x
  3. Step 3: Cross multiply
    21,615.65x = 29,831.33 × 12,185.09
  4. Step 4: Simplify right side
    21,615.65x = 363,497,379.94
  5. Step 5: Solve for x
    x = 363,497,379.94/21,615.65
  6. Step 6: Final answer
    x = 16,816.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.