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Finding the Fourth Proportional to 8,811.40, 12,153.36 and 7,483

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Solution

The fourth proportional to 8,811.40, 12,153.36 and 7,483 is: 10,321.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.40 : 12,153.36 = 7,483 : x
  2. Step 2: Convert to fraction form
    8,811.40/12,153.36 = 7,483/x
  3. Step 3: Cross multiply
    8,811.40x = 12,153.36 × 7,483
  4. Step 4: Simplify right side
    8,811.40x = 90,943,592.88
  5. Step 5: Solve for x
    x = 90,943,592.88/8,811.40
  6. Step 6: Final answer
    x = 10,321.13

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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.