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Finding the Fourth Proportional to 14,169.60, 21,270.60 and 8,629.20

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Solution

The fourth proportional to 14,169.60, 21,270.60 and 8,629.20 is: 12,953.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,169.60 : 21,270.60 = 8,629.20 : x
  2. Step 2: Convert to fraction form
    14,169.60/21,270.60 = 8,629.20/x
  3. Step 3: Cross multiply
    14,169.60x = 21,270.60 × 8,629.20
  4. Step 4: Simplify right side
    14,169.60x = 183,548,261.52
  5. Step 5: Solve for x
    x = 183,548,261.52/14,169.60
  6. Step 6: Final answer
    x = 12,953.67

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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.