Home / 12,698.10-19,010.70-11,977.20

Finding the Fourth Proportional to 12,698.10, 19,010.70 and 11,977.20

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Solution

The fourth proportional to 12,698.10, 19,010.70 and 11,977.20 is: 17,931.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,698.10 : 19,010.70 = 11,977.20 : x
  2. Step 2: Convert to fraction form
    12,698.10/19,010.70 = 11,977.20/x
  3. Step 3: Cross multiply
    12,698.10x = 19,010.70 × 11,977.20
  4. Step 4: Simplify right side
    12,698.10x = 227,694,956.04
  5. Step 5: Solve for x
    x = 227,694,956.04/12,698.10
  6. Step 6: Final answer
    x = 17,931.42

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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.