Home / 12,905.40-19,314.90-11,350.20

Finding the Fourth Proportional to 12,905.40, 19,314.90 and 11,350.20

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Solution

The fourth proportional to 12,905.40, 19,314.90 and 11,350.20 is: 16,987.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.40 : 19,314.90 = 11,350.20 : x
  2. Step 2: Convert to fraction form
    12,905.40/19,314.90 = 11,350.20/x
  3. Step 3: Cross multiply
    12,905.40x = 19,314.90 × 11,350.20
  4. Step 4: Simplify right side
    12,905.40x = 219,227,977.98
  5. Step 5: Solve for x
    x = 219,227,977.98/12,905.40
  6. Step 6: Final answer
    x = 16,987.31

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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.