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Finding the Fourth Proportional to 12,699.80, 19,020.90 and 8,034.20

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Solution

The fourth proportional to 12,699.80, 19,020.90 and 8,034.20 is: 12,033.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.80 : 19,020.90 = 8,034.20 : x
  2. Step 2: Convert to fraction form
    12,699.80/19,020.90 = 8,034.20/x
  3. Step 3: Cross multiply
    12,699.80x = 19,020.90 × 8,034.20
  4. Step 4: Simplify right side
    12,699.80x = 152,817,714.78
  5. Step 5: Solve for x
    x = 152,817,714.78/12,699.80
  6. Step 6: Final answer
    x = 12,033.08

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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.