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Finding the Fourth Proportional to 8,622.40, 12,933.60 and 4,248.40

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Solution

The fourth proportional to 8,622.40, 12,933.60 and 4,248.40 is: 6,372.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.40 : 12,933.60 = 4,248.40 : x
  2. Step 2: Convert to fraction form
    8,622.40/12,933.60 = 4,248.40/x
  3. Step 3: Cross multiply
    8,622.40x = 12,933.60 × 4,248.40
  4. Step 4: Simplify right side
    8,622.40x = 54,947,106.24
  5. Step 5: Solve for x
    x = 54,947,106.24/8,622.40
  6. Step 6: Final answer
    x = 6,372.60

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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.