Home / 13,679.45-18,876.50-7,712.58

Finding the Fourth Proportional to 13,679.45, 18,876.50 and 7,712.58

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Solution

The fourth proportional to 13,679.45, 18,876.50 and 7,712.58 is: 10,642.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.45 : 18,876.50 = 7,712.58 : x
  2. Step 2: Convert to fraction form
    13,679.45/18,876.50 = 7,712.58/x
  3. Step 3: Cross multiply
    13,679.45x = 18,876.50 × 7,712.58
  4. Step 4: Simplify right side
    13,679.45x = 145,586,516.37
  5. Step 5: Solve for x
    x = 145,586,516.37/13,679.45
  6. Step 6: Final answer
    x = 10,642.72

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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.