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Finding the Fourth Proportional to 14,012.80, 21,002.55 and 7,435.60

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Solution

The fourth proportional to 14,012.80, 21,002.55 and 7,435.60 is: 11,144.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,012.80 : 21,002.55 = 7,435.60 : x
  2. Step 2: Convert to fraction form
    14,012.80/21,002.55 = 7,435.60/x
  3. Step 3: Cross multiply
    14,012.80x = 21,002.55 × 7,435.60
  4. Step 4: Simplify right side
    14,012.80x = 156,166,560.78
  5. Step 5: Solve for x
    x = 156,166,560.78/14,012.80
  6. Step 6: Final answer
    x = 11,144.57

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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.