Home / 13,447.08-18,555.78-7,857

Finding the Fourth Proportional to 13,447.08, 18,555.78 and 7,857

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Solution

The fourth proportional to 13,447.08, 18,555.78 and 7,857 is: 10,841.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,447.08 : 18,555.78 = 7,857 : x
  2. Step 2: Convert to fraction form
    13,447.08/18,555.78 = 7,857/x
  3. Step 3: Cross multiply
    13,447.08x = 18,555.78 × 7,857
  4. Step 4: Simplify right side
    13,447.08x = 145,792,763.46
  5. Step 5: Solve for x
    x = 145,792,763.46/13,447.08
  6. Step 6: Final answer
    x = 10,841.96

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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.