Home / 11,355.66-15,666.46-8,378.60

Finding the Fourth Proportional to 11,355.66, 15,666.46 and 8,378.60

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Solution

The fourth proportional to 11,355.66, 15,666.46 and 8,378.60 is: 11,559.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.66 : 15,666.46 = 8,378.60 : x
  2. Step 2: Convert to fraction form
    11,355.66/15,666.46 = 8,378.60/x
  3. Step 3: Cross multiply
    11,355.66x = 15,666.46 × 8,378.60
  4. Step 4: Simplify right side
    11,355.66x = 131,262,902.48
  5. Step 5: Solve for x
    x = 131,262,902.48/11,355.66
  6. Step 6: Final answer
    x = 11,559.25

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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.