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Finding the Fourth Proportional to 14,690.90, 20,271.40 and 8,641.41

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Solution

The fourth proportional to 14,690.90, 20,271.40 and 8,641.41 is: 11,923.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,690.90 : 20,271.40 = 8,641.41 : x
  2. Step 2: Convert to fraction form
    14,690.90/20,271.40 = 8,641.41/x
  3. Step 3: Cross multiply
    14,690.90x = 20,271.40 × 8,641.41
  4. Step 4: Simplify right side
    14,690.90x = 175,173,435.47
  5. Step 5: Solve for x
    x = 175,173,435.47/14,690.90
  6. Step 6: Final answer
    x = 11,923.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.