Home / 15,291.27-21,100.86-8,485.65

Finding the Fourth Proportional to 15,291.27, 21,100.86 and 8,485.65

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Solution

The fourth proportional to 15,291.27, 21,100.86 and 8,485.65 is: 11,709.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,291.27 : 21,100.86 = 8,485.65 : x
  2. Step 2: Convert to fraction form
    15,291.27/21,100.86 = 8,485.65/x
  3. Step 3: Cross multiply
    15,291.27x = 21,100.86 × 8,485.65
  4. Step 4: Simplify right side
    15,291.27x = 179,054,512.66
  5. Step 5: Solve for x
    x = 179,054,512.66/15,291.27
  6. Step 6: Final answer
    x = 11,709.59

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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.