Home / 21,409.04-29,546.52-11,978.48

Finding the Fourth Proportional to 21,409.04, 29,546.52 and 11,978.48

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Solution

The fourth proportional to 21,409.04, 29,546.52 and 11,978.48 is: 16,531.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,409.04 : 29,546.52 = 11,978.48 : x
  2. Step 2: Convert to fraction form
    21,409.04/29,546.52 = 11,978.48/x
  3. Step 3: Cross multiply
    21,409.04x = 29,546.52 × 11,978.48
  4. Step 4: Simplify right side
    21,409.04x = 353,922,398.89
  5. Step 5: Solve for x
    x = 353,922,398.89/21,409.04
  6. Step 6: Final answer
    x = 16,531.45

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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.