Home / 15,494.56-21,378.96-8,778.65

Finding the Fourth Proportional to 15,494.56, 21,378.96 and 8,778.65

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Solution

The fourth proportional to 15,494.56, 21,378.96 and 8,778.65 is: 12,112.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.56 : 21,378.96 = 8,778.65 : x
  2. Step 2: Convert to fraction form
    15,494.56/21,378.96 = 8,778.65/x
  3. Step 3: Cross multiply
    15,494.56x = 21,378.96 × 8,778.65
  4. Step 4: Simplify right side
    15,494.56x = 187,678,300.31
  5. Step 5: Solve for x
    x = 187,678,300.31/15,494.56
  6. Step 6: Final answer
    x = 12,112.53

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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.