Home / 21,827.40-30,121.85-12,395.96

Finding the Fourth Proportional to 21,827.40, 30,121.85 and 12,395.96

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Solution

The fourth proportional to 21,827.40, 30,121.85 and 12,395.96 is: 17,106.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,827.40 : 30,121.85 = 12,395.96 : x
  2. Step 2: Convert to fraction form
    21,827.40/30,121.85 = 12,395.96/x
  3. Step 3: Cross multiply
    21,827.40x = 30,121.85 × 12,395.96
  4. Step 4: Simplify right side
    21,827.40x = 373,389,247.73
  5. Step 5: Solve for x
    x = 373,389,247.73/21,827.40
  6. Step 6: Final answer
    x = 17,106.45

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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.