Home / 21,428.58-29,569.78-11,995.86

Finding the Fourth Proportional to 21,428.58, 29,569.78 and 11,995.86

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Solution

The fourth proportional to 21,428.58, 29,569.78 and 11,995.86 is: 16,553.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.58 : 29,569.78 = 11,995.86 : x
  2. Step 2: Convert to fraction form
    21,428.58/29,569.78 = 11,995.86/x
  3. Step 3: Cross multiply
    21,428.58x = 29,569.78 × 11,995.86
  4. Step 4: Simplify right side
    21,428.58x = 354,714,941.11
  5. Step 5: Solve for x
    x = 354,714,941.11/21,428.58
  6. Step 6: Final answer
    x = 16,553.36

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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.