Home / 10,939.86-16,409.66-7,421.15

Finding the Fourth Proportional to 10,939.86, 16,409.66 and 7,421.15

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Solution

The fourth proportional to 10,939.86, 16,409.66 and 7,421.15 is: 11,131.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,939.86 : 16,409.66 = 7,421.15 : x
  2. Step 2: Convert to fraction form
    10,939.86/16,409.66 = 7,421.15/x
  3. Step 3: Cross multiply
    10,939.86x = 16,409.66 × 7,421.15
  4. Step 4: Simplify right side
    10,939.86x = 121,778,466.26
  5. Step 5: Solve for x
    x = 121,778,466.26/10,939.86
  6. Step 6: Final answer
    x = 11,131.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.