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Finding the Fourth Proportional to 14,290.40, 21,435.60 and 4,429.60

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Solution

The fourth proportional to 14,290.40, 21,435.60 and 4,429.60 is: 6,644.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,290.40 : 21,435.60 = 4,429.60 : x
  2. Step 2: Convert to fraction form
    14,290.40/21,435.60 = 4,429.60/x
  3. Step 3: Cross multiply
    14,290.40x = 21,435.60 × 4,429.60
  4. Step 4: Simplify right side
    14,290.40x = 94,951,133.76
  5. Step 5: Solve for x
    x = 94,951,133.76/14,290.40
  6. Step 6: Final answer
    x = 6,644.40

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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.