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Finding the Fourth Proportional to 12,702.78, 19,012.77 and 11,490.30

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Solution

The fourth proportional to 12,702.78, 19,012.77 and 11,490.30 is: 17,198.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,702.78 : 19,012.77 = 11,490.30 : x
  2. Step 2: Convert to fraction form
    12,702.78/19,012.77 = 11,490.30/x
  3. Step 3: Cross multiply
    12,702.78x = 19,012.77 × 11,490.30
  4. Step 4: Simplify right side
    12,702.78x = 218,462,431.13
  5. Step 5: Solve for x
    x = 218,462,431.13/12,702.78
  6. Step 6: Final answer
    x = 17,198.00

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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.