Home / 14,198.20-21,281.15-8,639.30

Finding the Fourth Proportional to 14,198.20, 21,281.15 and 8,639.30

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Solution

The fourth proportional to 14,198.20, 21,281.15 and 8,639.30 is: 12,949.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,198.20 : 21,281.15 = 8,639.30 : x
  2. Step 2: Convert to fraction form
    14,198.20/21,281.15 = 8,639.30/x
  3. Step 3: Cross multiply
    14,198.20x = 21,281.15 × 8,639.30
  4. Step 4: Simplify right side
    14,198.20x = 183,854,314.00
  5. Step 5: Solve for x
    x = 183,854,314.00/14,198.20
  6. Step 6: Final answer
    x = 12,949.13

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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.