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Finding the Fourth Proportional to 13,665.69, 18,859.74 and 7,696.98

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Solution

The fourth proportional to 13,665.69, 18,859.74 and 7,696.98 is: 10,622.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,665.69 : 18,859.74 = 7,696.98 : x
  2. Step 2: Convert to fraction form
    13,665.69/18,859.74 = 7,696.98/x
  3. Step 3: Cross multiply
    13,665.69x = 18,859.74 × 7,696.98
  4. Step 4: Simplify right side
    13,665.69x = 145,163,041.59
  5. Step 5: Solve for x
    x = 145,163,041.59/13,665.69
  6. Step 6: Final answer
    x = 10,622.45

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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.