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Finding the Fourth Proportional to 12,702.51, 19,054.98 and 7,445.43

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Solution

The fourth proportional to 12,702.51, 19,054.98 and 7,445.43 is: 11,168.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,702.51 : 19,054.98 = 7,445.43 : x
  2. Step 2: Convert to fraction form
    12,702.51/19,054.98 = 7,445.43/x
  3. Step 3: Cross multiply
    12,702.51x = 19,054.98 × 7,445.43
  4. Step 4: Simplify right side
    12,702.51x = 141,872,519.74
  5. Step 5: Solve for x
    x = 141,872,519.74/12,702.51
  6. Step 6: Final answer
    x = 11,168.86

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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.