Home / 19,880.70-27,435.99-11,382.86

Finding the Fourth Proportional to 19,880.70, 27,435.99 and 11,382.86

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Solution

The fourth proportional to 19,880.70, 27,435.99 and 11,382.86 is: 15,708.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,880.70 : 27,435.99 = 11,382.86 : x
  2. Step 2: Convert to fraction form
    19,880.70/27,435.99 = 11,382.86/x
  3. Step 3: Cross multiply
    19,880.70x = 27,435.99 × 11,382.86
  4. Step 4: Simplify right side
    19,880.70x = 312,299,895.95
  5. Step 5: Solve for x
    x = 312,299,895.95/19,880.70
  6. Step 6: Final answer
    x = 15,708.70

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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.