Home / 21,320.20-29,429.22-12,827.08

Finding the Fourth Proportional to 21,320.20, 29,429.22 and 12,827.08

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Solution

The fourth proportional to 21,320.20, 29,429.22 and 12,827.08 is: 17,705.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.20 : 29,429.22 = 12,827.08 : x
  2. Step 2: Convert to fraction form
    21,320.20/29,429.22 = 12,827.08/x
  3. Step 3: Cross multiply
    21,320.20x = 29,429.22 × 12,827.08
  4. Step 4: Simplify right side
    21,320.20x = 377,490,959.28
  5. Step 5: Solve for x
    x = 377,490,959.28/21,320.20
  6. Step 6: Final answer
    x = 17,705.79

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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.