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Finding the Fourth Proportional to 12,643.44, 18,959.63 and 6,718.90

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Solution

The fourth proportional to 12,643.44, 18,959.63 and 6,718.90 is: 10,075.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.44 : 18,959.63 = 6,718.90 : x
  2. Step 2: Convert to fraction form
    12,643.44/18,959.63 = 6,718.90/x
  3. Step 3: Cross multiply
    12,643.44x = 18,959.63 × 6,718.90
  4. Step 4: Simplify right side
    12,643.44x = 127,387,827.41
  5. Step 5: Solve for x
    x = 127,387,827.41/12,643.44
  6. Step 6: Final answer
    x = 10,075.41

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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.