Home / 13,579.77-18,740.63-7,611.40

Finding the Fourth Proportional to 13,579.77, 18,740.63 and 7,611.40

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Solution

The fourth proportional to 13,579.77, 18,740.63 and 7,611.40 is: 10,504.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.77 : 18,740.63 = 7,611.40 : x
  2. Step 2: Convert to fraction form
    13,579.77/18,740.63 = 7,611.40/x
  3. Step 3: Cross multiply
    13,579.77x = 18,740.63 × 7,611.40
  4. Step 4: Simplify right side
    13,579.77x = 142,642,299.42
  5. Step 5: Solve for x
    x = 142,642,299.42/13,579.77
  6. Step 6: Final answer
    x = 10,504.03

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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.