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Finding the Fourth Proportional to 8,999.75, 12,419.54 and 5,223.57

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Solution

The fourth proportional to 8,999.75, 12,419.54 and 5,223.57 is: 7,208.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.75 : 12,419.54 = 5,223.57 : x
  2. Step 2: Convert to fraction form
    8,999.75/12,419.54 = 5,223.57/x
  3. Step 3: Cross multiply
    8,999.75x = 12,419.54 × 5,223.57
  4. Step 4: Simplify right side
    8,999.75x = 64,874,283.46
  5. Step 5: Solve for x
    x = 64,874,283.46/8,999.75
  6. Step 6: Final answer
    x = 7,208.45

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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.