Home / 14,115.80-21,173.70-12,690.20

Finding the Fourth Proportional to 14,115.80, 21,173.70 and 12,690.20

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Solution

The fourth proportional to 14,115.80, 21,173.70 and 12,690.20 is: 19,035.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,115.80 : 21,173.70 = 12,690.20 : x
  2. Step 2: Convert to fraction form
    14,115.80/21,173.70 = 12,690.20/x
  3. Step 3: Cross multiply
    14,115.80x = 21,173.70 × 12,690.20
  4. Step 4: Simplify right side
    14,115.80x = 268,698,487.74
  5. Step 5: Solve for x
    x = 268,698,487.74/14,115.80
  6. Step 6: Final answer
    x = 19,035.30

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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.