Home / 21,179.20-29,232.04-12,228.28

Finding the Fourth Proportional to 21,179.20, 29,232.04 and 12,228.28

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Solution

The fourth proportional to 21,179.20, 29,232.04 and 12,228.28 is: 16,877.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.20 : 29,232.04 = 12,228.28 : x
  2. Step 2: Convert to fraction form
    21,179.20/29,232.04 = 12,228.28/x
  3. Step 3: Cross multiply
    21,179.20x = 29,232.04 × 12,228.28
  4. Step 4: Simplify right side
    21,179.20x = 357,457,570.09
  5. Step 5: Solve for x
    x = 357,457,570.09/21,179.20
  6. Step 6: Final answer
    x = 16,877.77

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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.