Home / 11,151.51-15,389.07-6,115.80

Finding the Fourth Proportional to 11,151.51, 15,389.07 and 6,115.80

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Solution

The fourth proportional to 11,151.51, 15,389.07 and 6,115.80 is: 8,439.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,151.51 : 15,389.07 = 6,115.80 : x
  2. Step 2: Convert to fraction form
    11,151.51/15,389.07 = 6,115.80/x
  3. Step 3: Cross multiply
    11,151.51x = 15,389.07 × 6,115.80
  4. Step 4: Simplify right side
    11,151.51x = 94,116,474.31
  5. Step 5: Solve for x
    x = 94,116,474.31/11,151.51
  6. Step 6: Final answer
    x = 8,439.80

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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.