Home / 13,724.10-18,939.51-8,416.98

Finding the Fourth Proportional to 13,724.10, 18,939.51 and 8,416.98

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Solution

The fourth proportional to 13,724.10, 18,939.51 and 8,416.98 is: 11,615.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,724.10 : 18,939.51 = 8,416.98 : x
  2. Step 2: Convert to fraction form
    13,724.10/18,939.51 = 8,416.98/x
  3. Step 3: Cross multiply
    13,724.10x = 18,939.51 × 8,416.98
  4. Step 4: Simplify right side
    13,724.10x = 159,413,476.88
  5. Step 5: Solve for x
    x = 159,413,476.88/13,724.10
  6. Step 6: Final answer
    x = 11,615.59

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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.