Home / 21,357.68-29,467.09-12,403.45

Finding the Fourth Proportional to 21,357.68, 29,467.09 and 12,403.45

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Solution

The fourth proportional to 21,357.68, 29,467.09 and 12,403.45 is: 17,112.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,357.68 : 29,467.09 = 12,403.45 : x
  2. Step 2: Convert to fraction form
    21,357.68/29,467.09 = 12,403.45/x
  3. Step 3: Cross multiply
    21,357.68x = 29,467.09 × 12,403.45
  4. Step 4: Simplify right side
    21,357.68x = 365,493,619.44
  5. Step 5: Solve for x
    x = 365,493,619.44/21,357.68
  6. Step 6: Final answer
    x = 17,112.98

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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.