Home / 11,515.79-15,891.54-6,411.23

Finding the Fourth Proportional to 11,515.79, 15,891.54 and 6,411.23

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Solution

The fourth proportional to 11,515.79, 15,891.54 and 6,411.23 is: 8,847.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,515.79 : 15,891.54 = 6,411.23 : x
  2. Step 2: Convert to fraction form
    11,515.79/15,891.54 = 6,411.23/x
  3. Step 3: Cross multiply
    11,515.79x = 15,891.54 × 6,411.23
  4. Step 4: Simplify right side
    11,515.79x = 101,884,357.72
  5. Step 5: Solve for x
    x = 101,884,357.72/11,515.79
  6. Step 6: Final answer
    x = 8,847.37

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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.