Home / 13,611.54-18,784.80-7,643.46

Finding the Fourth Proportional to 13,611.54, 18,784.80 and 7,643.46

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Solution

The fourth proportional to 13,611.54, 18,784.80 and 7,643.46 is: 10,548.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.54 : 18,784.80 = 7,643.46 : x
  2. Step 2: Convert to fraction form
    13,611.54/18,784.80 = 7,643.46/x
  3. Step 3: Cross multiply
    13,611.54x = 18,784.80 × 7,643.46
  4. Step 4: Simplify right side
    13,611.54x = 143,580,867.41
  5. Step 5: Solve for x
    x = 143,580,867.41/13,611.54
  6. Step 6: Final answer
    x = 10,548.47

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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.