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Finding the Fourth Proportional to 14,421.42, 21,639.42 and 6,629.22

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Solution

The fourth proportional to 14,421.42, 21,639.42 and 6,629.22 is: 9,947.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,421.42 : 21,639.42 = 6,629.22 : x
  2. Step 2: Convert to fraction form
    14,421.42/21,639.42 = 6,629.22/x
  3. Step 3: Cross multiply
    14,421.42x = 21,639.42 × 6,629.22
  4. Step 4: Simplify right side
    14,421.42x = 143,452,475.85
  5. Step 5: Solve for x
    x = 143,452,475.85/14,421.42
  6. Step 6: Final answer
    x = 9,947.18

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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.