Home / 13,687.06-18,886.70-7,719.64

Finding the Fourth Proportional to 13,687.06, 18,886.70 and 7,719.64

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Solution

The fourth proportional to 13,687.06, 18,886.70 and 7,719.64 is: 10,652.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.06 : 18,886.70 = 7,719.64 : x
  2. Step 2: Convert to fraction form
    13,687.06/18,886.70 = 7,719.64/x
  3. Step 3: Cross multiply
    13,687.06x = 18,886.70 × 7,719.64
  4. Step 4: Simplify right side
    13,687.06x = 145,798,524.79
  5. Step 5: Solve for x
    x = 145,798,524.79/13,687.06
  6. Step 6: Final answer
    x = 10,652.29

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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.