Home / 15,118.56-20,858.09-9,148.05

Finding the Fourth Proportional to 15,118.56, 20,858.09 and 9,148.05

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Solution

The fourth proportional to 15,118.56, 20,858.09 and 9,148.05 is: 12,620.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.56 : 20,858.09 = 9,148.05 : x
  2. Step 2: Convert to fraction form
    15,118.56/20,858.09 = 9,148.05/x
  3. Step 3: Cross multiply
    15,118.56x = 20,858.09 × 9,148.05
  4. Step 4: Simplify right side
    15,118.56x = 190,810,804.48
  5. Step 5: Solve for x
    x = 190,810,804.48/15,118.56
  6. Step 6: Final answer
    x = 12,620.96

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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.