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Finding the Fourth Proportional to 13,486.77, 18,612.18 and 7,519.71

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Solution

The fourth proportional to 13,486.77, 18,612.18 and 7,519.71 is: 10,377.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.77 : 18,612.18 = 7,519.71 : x
  2. Step 2: Convert to fraction form
    13,486.77/18,612.18 = 7,519.71/x
  3. Step 3: Cross multiply
    13,486.77x = 18,612.18 × 7,519.71
  4. Step 4: Simplify right side
    13,486.77x = 139,958,196.07
  5. Step 5: Solve for x
    x = 139,958,196.07/13,486.77
  6. Step 6: Final answer
    x = 10,377.44

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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.