Home / 15,403.88-21,257.36-8,330.31

Finding the Fourth Proportional to 15,403.88, 21,257.36 and 8,330.31

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Solution

The fourth proportional to 15,403.88, 21,257.36 and 8,330.31 is: 11,495.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.88 : 21,257.36 = 8,330.31 : x
  2. Step 2: Convert to fraction form
    15,403.88/21,257.36 = 8,330.31/x
  3. Step 3: Cross multiply
    15,403.88x = 21,257.36 × 8,330.31
  4. Step 4: Simplify right side
    15,403.88x = 177,080,269.20
  5. Step 5: Solve for x
    x = 177,080,269.20/15,403.88
  6. Step 6: Final answer
    x = 11,495.82

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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.