Home / 11,403.72-15,738.12-6,688.80

Finding the Fourth Proportional to 11,403.72, 15,738.12 and 6,688.80

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Solution

The fourth proportional to 11,403.72, 15,738.12 and 6,688.80 is: 9,231.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,403.72 : 15,738.12 = 6,688.80 : x
  2. Step 2: Convert to fraction form
    11,403.72/15,738.12 = 6,688.80/x
  3. Step 3: Cross multiply
    11,403.72x = 15,738.12 × 6,688.80
  4. Step 4: Simplify right side
    11,403.72x = 105,269,137.06
  5. Step 5: Solve for x
    x = 105,269,137.06/11,403.72
  6. Step 6: Final answer
    x = 9,231.12

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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.