Home / 15,485.80-21,370.16-8,412.16

Finding the Fourth Proportional to 15,485.80, 21,370.16 and 8,412.16

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Solution

The fourth proportional to 15,485.80, 21,370.16 and 8,412.16 is: 11,608.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.80 : 21,370.16 = 8,412.16 : x
  2. Step 2: Convert to fraction form
    15,485.80/21,370.16 = 8,412.16/x
  3. Step 3: Cross multiply
    15,485.80x = 21,370.16 × 8,412.16
  4. Step 4: Simplify right side
    15,485.80x = 179,769,205.15
  5. Step 5: Solve for x
    x = 179,769,205.15/15,485.80
  6. Step 6: Final answer
    x = 11,608.65

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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.