Home / 13,686.26-18,887.16-7,718.09

Finding the Fourth Proportional to 13,686.26, 18,887.16 and 7,718.09

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Solution

The fourth proportional to 13,686.26, 18,887.16 and 7,718.09 is: 10,651.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.26 : 18,887.16 = 7,718.09 : x
  2. Step 2: Convert to fraction form
    13,686.26/18,887.16 = 7,718.09/x
  3. Step 3: Cross multiply
    13,686.26x = 18,887.16 × 7,718.09
  4. Step 4: Simplify right side
    13,686.26x = 145,772,706.29
  5. Step 5: Solve for x
    x = 145,772,706.29/13,686.26
  6. Step 6: Final answer
    x = 10,651.03

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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.