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Finding the Fourth Proportional to 8,811.90, 12,154.05 and 7,483.50

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Solution

The fourth proportional to 8,811.90, 12,154.05 and 7,483.50 is: 10,321.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.90 : 12,154.05 = 7,483.50 : x
  2. Step 2: Convert to fraction form
    8,811.90/12,154.05 = 7,483.50/x
  3. Step 3: Cross multiply
    8,811.90x = 12,154.05 × 7,483.50
  4. Step 4: Simplify right side
    8,811.90x = 90,954,833.18
  5. Step 5: Solve for x
    x = 90,954,833.18/8,811.90
  6. Step 6: Final answer
    x = 10,321.82

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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.