Home / 11,505.16-15,867.36-9,721.39

Finding the Fourth Proportional to 11,505.16, 15,867.36 and 9,721.39

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Solution

The fourth proportional to 11,505.16, 15,867.36 and 9,721.39 is: 13,407.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,505.16 : 15,867.36 = 9,721.39 : x
  2. Step 2: Convert to fraction form
    11,505.16/15,867.36 = 9,721.39/x
  3. Step 3: Cross multiply
    11,505.16x = 15,867.36 × 9,721.39
  4. Step 4: Simplify right side
    11,505.16x = 154,252,794.83
  5. Step 5: Solve for x
    x = 154,252,794.83/11,505.16
  6. Step 6: Final answer
    x = 13,407.27

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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.