Home / 15,509.88-21,403.62-8,436.33

Finding the Fourth Proportional to 15,509.88, 21,403.62 and 8,436.33

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Solution

The fourth proportional to 15,509.88, 21,403.62 and 8,436.33 is: 11,642.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.88 : 21,403.62 = 8,436.33 : x
  2. Step 2: Convert to fraction form
    15,509.88/21,403.62 = 8,436.33/x
  3. Step 3: Cross multiply
    15,509.88x = 21,403.62 × 8,436.33
  4. Step 4: Simplify right side
    15,509.88x = 180,568,001.51
  5. Step 5: Solve for x
    x = 180,568,001.51/15,509.88
  6. Step 6: Final answer
    x = 11,642.13

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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.