Home / 13,579.68-18,739.79-7,611.34

Finding the Fourth Proportional to 13,579.68, 18,739.79 and 7,611.34

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Solution

The fourth proportional to 13,579.68, 18,739.79 and 7,611.34 is: 10,503.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.68 : 18,739.79 = 7,611.34 : x
  2. Step 2: Convert to fraction form
    13,579.68/18,739.79 = 7,611.34/x
  3. Step 3: Cross multiply
    13,579.68x = 18,739.79 × 7,611.34
  4. Step 4: Simplify right side
    13,579.68x = 142,634,913.22
  5. Step 5: Solve for x
    x = 142,634,913.22/13,579.68
  6. Step 6: Final answer
    x = 10,503.55

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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.