Home / 11,085.66-15,291.18-7,111.80

Finding the Fourth Proportional to 11,085.66, 15,291.18 and 7,111.80

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Solution

The fourth proportional to 11,085.66, 15,291.18 and 7,111.80 is: 9,809.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,085.66 : 15,291.18 = 7,111.80 : x
  2. Step 2: Convert to fraction form
    11,085.66/15,291.18 = 7,111.80/x
  3. Step 3: Cross multiply
    11,085.66x = 15,291.18 × 7,111.80
  4. Step 4: Simplify right side
    11,085.66x = 108,747,813.92
  5. Step 5: Solve for x
    x = 108,747,813.92/11,085.66
  6. Step 6: Final answer
    x = 9,809.77

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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.