Home / 15,394.80-21,245.04-8,680.74

Finding the Fourth Proportional to 15,394.80, 21,245.04 and 8,680.74

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Solution

The fourth proportional to 15,394.80, 21,245.04 and 8,680.74 is: 11,979.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,394.80 : 21,245.04 = 8,680.74 : x
  2. Step 2: Convert to fraction form
    15,394.80/21,245.04 = 8,680.74/x
  3. Step 3: Cross multiply
    15,394.80x = 21,245.04 × 8,680.74
  4. Step 4: Simplify right side
    15,394.80x = 184,422,668.53
  5. Step 5: Solve for x
    x = 184,422,668.53/15,394.80
  6. Step 6: Final answer
    x = 11,979.54

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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.