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Finding the Fourth Proportional to 21,821.04, 30,113.04 and 12,391.04

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Solution

The fourth proportional to 21,821.04, 30,113.04 and 12,391.04 is: 17,099.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.04 : 30,113.04 = 12,391.04 : x
  2. Step 2: Convert to fraction form
    21,821.04/30,113.04 = 12,391.04/x
  3. Step 3: Cross multiply
    21,821.04x = 30,113.04 × 12,391.04
  4. Step 4: Simplify right side
    21,821.04x = 373,131,883.16
  5. Step 5: Solve for x
    x = 373,131,883.16/21,821.04
  6. Step 6: Final answer
    x = 17,099.64

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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.