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Finding the Fourth Proportional to 12,656.25, 18,959.67 and 7,713.63

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Solution

The fourth proportional to 12,656.25, 18,959.67 and 7,713.63 is: 11,555.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.25 : 18,959.67 = 7,713.63 : x
  2. Step 2: Convert to fraction form
    12,656.25/18,959.67 = 7,713.63/x
  3. Step 3: Cross multiply
    12,656.25x = 18,959.67 × 7,713.63
  4. Step 4: Simplify right side
    12,656.25x = 146,247,879.30
  5. Step 5: Solve for x
    x = 146,247,879.30/12,656.25
  6. Step 6: Final answer
    x = 11,555.39

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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.