Home / 13,540.21-18,646.74-12,696.39

Finding the Fourth Proportional to 13,540.21, 18,646.74 and 12,696.39

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Solution

The fourth proportional to 13,540.21, 18,646.74 and 12,696.39 is: 17,484.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.21 : 18,646.74 = 12,696.39 : x
  2. Step 2: Convert to fraction form
    13,540.21/18,646.74 = 12,696.39/x
  3. Step 3: Cross multiply
    13,540.21x = 18,646.74 × 12,696.39
  4. Step 4: Simplify right side
    13,540.21x = 236,746,283.27
  5. Step 5: Solve for x
    x = 236,746,283.27/13,540.21
  6. Step 6: Final answer
    x = 17,484.69

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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.