Home / 15,509.88-21,403.71-8,436.29

Finding the Fourth Proportional to 15,509.88, 21,403.71 and 8,436.29

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Solution

The fourth proportional to 15,509.88, 21,403.71 and 8,436.29 is: 11,642.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,509.88 : 21,403.71 = 8,436.29 : x
  2. Step 2: Convert to fraction form
    15,509.88/21,403.71 = 8,436.29/x
  3. Step 3: Cross multiply
    15,509.88x = 21,403.71 × 8,436.29
  4. Step 4: Simplify right side
    15,509.88x = 180,567,797.62
  5. Step 5: Solve for x
    x = 180,567,797.62/15,509.88
  6. Step 6: Final answer
    x = 11,642.11

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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.