Home / 15,486.12-21,370.81-8,412.55

Finding the Fourth Proportional to 15,486.12, 21,370.81 and 8,412.55

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Solution

The fourth proportional to 15,486.12, 21,370.81 and 8,412.55 is: 11,609.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,486.12 : 21,370.81 = 8,412.55 : x
  2. Step 2: Convert to fraction form
    15,486.12/21,370.81 = 8,412.55/x
  3. Step 3: Cross multiply
    15,486.12x = 21,370.81 × 8,412.55
  4. Step 4: Simplify right side
    15,486.12x = 179,783,007.67
  5. Step 5: Solve for x
    x = 179,783,007.67/15,486.12
  6. Step 6: Final answer
    x = 11,609.30

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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.