Home / 15,416.36-21,274.64-8,342.78

Finding the Fourth Proportional to 15,416.36, 21,274.64 and 8,342.78

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Solution

The fourth proportional to 15,416.36, 21,274.64 and 8,342.78 is: 11,513.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,416.36 : 21,274.64 = 8,342.78 : x
  2. Step 2: Convert to fraction form
    15,416.36/21,274.64 = 8,342.78/x
  3. Step 3: Cross multiply
    15,416.36x = 21,274.64 × 8,342.78
  4. Step 4: Simplify right side
    15,416.36x = 177,489,648.01
  5. Step 5: Solve for x
    x = 177,489,648.01/15,416.36
  6. Step 6: Final answer
    x = 11,513.07

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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.