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Finding the Fourth Proportional to 8,989.48, 13,483.80 and 3,147.40

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Solution

The fourth proportional to 8,989.48, 13,483.80 and 3,147.40 is: 4,720.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.48 : 13,483.80 = 3,147.40 : x
  2. Step 2: Convert to fraction form
    8,989.48/13,483.80 = 3,147.40/x
  3. Step 3: Cross multiply
    8,989.48x = 13,483.80 × 3,147.40
  4. Step 4: Simplify right side
    8,989.48x = 42,438,912.12
  5. Step 5: Solve for x
    x = 42,438,912.12/8,989.48
  6. Step 6: Final answer
    x = 4,720.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.