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Finding the Fourth Proportional to 12,641.80, 18,970.80 and 7,376.80

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Solution

The fourth proportional to 12,641.80, 18,970.80 and 7,376.80 is: 11,069.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.80 : 18,970.80 = 7,376.80 : x
  2. Step 2: Convert to fraction form
    12,641.80/18,970.80 = 7,376.80/x
  3. Step 3: Cross multiply
    12,641.80x = 18,970.80 × 7,376.80
  4. Step 4: Simplify right side
    12,641.80x = 139,943,797.44
  5. Step 5: Solve for x
    x = 139,943,797.44/12,641.80
  6. Step 6: Final answer
    x = 11,069.93

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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.