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Finding the Fourth Proportional to 13,696.88, 18,888.26 and 8,320.10

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Solution

The fourth proportional to 13,696.88, 18,888.26 and 8,320.10 is: 11,473.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,696.88 : 18,888.26 = 8,320.10 : x
  2. Step 2: Convert to fraction form
    13,696.88/18,888.26 = 8,320.10/x
  3. Step 3: Cross multiply
    13,696.88x = 18,888.26 × 8,320.10
  4. Step 4: Simplify right side
    13,696.88x = 157,152,075.98
  5. Step 5: Solve for x
    x = 157,152,075.98/13,696.88
  6. Step 6: Final answer
    x = 11,473.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.