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Finding the Fourth Proportional to 15,485.46, 21,369.33 and 8,771.46

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Solution

The fourth proportional to 15,485.46, 21,369.33 and 8,771.46 is: 12,104.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.46 : 21,369.33 = 8,771.46 : x
  2. Step 2: Convert to fraction form
    15,485.46/21,369.33 = 8,771.46/x
  3. Step 3: Cross multiply
    15,485.46x = 21,369.33 × 8,771.46
  4. Step 4: Simplify right side
    15,485.46x = 187,440,223.32
  5. Step 5: Solve for x
    x = 187,440,223.32/15,485.46
  6. Step 6: Final answer
    x = 12,104.27

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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.