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Finding the Fourth Proportional to 12,290.40, 18,435.56 and 3,056.40

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Solution

The fourth proportional to 12,290.40, 18,435.56 and 3,056.40 is: 4,584.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,290.40 : 18,435.56 = 3,056.40 : x
  2. Step 2: Convert to fraction form
    12,290.40/18,435.56 = 3,056.40/x
  3. Step 3: Cross multiply
    12,290.40x = 18,435.56 × 3,056.40
  4. Step 4: Simplify right side
    12,290.40x = 56,346,445.58
  5. Step 5: Solve for x
    x = 56,346,445.58/12,290.40
  6. Step 6: Final answer
    x = 4,584.59

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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.