Home / 21,179.79-29,220.30-12,682.08

Finding the Fourth Proportional to 21,179.79, 29,220.30 and 12,682.08

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Solution

The fourth proportional to 21,179.79, 29,220.30 and 12,682.08 is: 17,496.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.79 : 29,220.30 = 12,682.08 : x
  2. Step 2: Convert to fraction form
    21,179.79/29,220.30 = 12,682.08/x
  3. Step 3: Cross multiply
    21,179.79x = 29,220.30 × 12,682.08
  4. Step 4: Simplify right side
    21,179.79x = 370,574,182.22
  5. Step 5: Solve for x
    x = 370,574,182.22/21,179.79
  6. Step 6: Final answer
    x = 17,496.59

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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.