Home / 21,168.10-29,215.79-12,214.36

Finding the Fourth Proportional to 21,168.10, 29,215.79 and 12,214.36

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Solution

The fourth proportional to 21,168.10, 29,215.79 and 12,214.36 is: 16,858.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.10 : 29,215.79 = 12,214.36 : x
  2. Step 2: Convert to fraction form
    21,168.10/29,215.79 = 12,214.36/x
  3. Step 3: Cross multiply
    21,168.10x = 29,215.79 × 12,214.36
  4. Step 4: Simplify right side
    21,168.10x = 356,852,176.74
  5. Step 5: Solve for x
    x = 356,852,176.74/21,168.10
  6. Step 6: Final answer
    x = 16,858.02

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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.