Home / 15,485.63-21,370.03-8,412.05

Finding the Fourth Proportional to 15,485.63, 21,370.03 and 8,412.05

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Solution

The fourth proportional to 15,485.63, 21,370.03 and 8,412.05 is: 11,608.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.63 : 21,370.03 = 8,412.05 : x
  2. Step 2: Convert to fraction form
    15,485.63/21,370.03 = 8,412.05/x
  3. Step 3: Cross multiply
    15,485.63x = 21,370.03 × 8,412.05
  4. Step 4: Simplify right side
    15,485.63x = 179,765,793.26
  5. Step 5: Solve for x
    x = 179,765,793.26/15,485.63
  6. Step 6: Final answer
    x = 11,608.55

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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.