Home / 13,686.21-18,888.06-7,718.43

Finding the Fourth Proportional to 13,686.21, 18,888.06 and 7,718.43

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Solution

The fourth proportional to 13,686.21, 18,888.06 and 7,718.43 is: 10,652.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.21 : 18,888.06 = 7,718.43 : x
  2. Step 2: Convert to fraction form
    13,686.21/18,888.06 = 7,718.43/x
  3. Step 3: Cross multiply
    13,686.21x = 18,888.06 × 7,718.43
  4. Step 4: Simplify right side
    13,686.21x = 145,786,168.95
  5. Step 5: Solve for x
    x = 145,786,168.95/13,686.21
  6. Step 6: Final answer
    x = 10,652.05

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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.