Home / 21,579.57-29,772.65-12,620.75

Finding the Fourth Proportional to 21,579.57, 29,772.65 and 12,620.75

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Solution

The fourth proportional to 21,579.57, 29,772.65 and 12,620.75 is: 17,412.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,579.57 : 29,772.65 = 12,620.75 : x
  2. Step 2: Convert to fraction form
    21,579.57/29,772.65 = 12,620.75/x
  3. Step 3: Cross multiply
    21,579.57x = 29,772.65 × 12,620.75
  4. Step 4: Simplify right side
    21,579.57x = 375,753,055.18
  5. Step 5: Solve for x
    x = 375,753,055.18/21,579.57
  6. Step 6: Final answer
    x = 17,412.44

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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.