Home / 21,581.43-29,782.37-12,630.65

Finding the Fourth Proportional to 21,581.43, 29,782.37 and 12,630.65

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Solution

The fourth proportional to 21,581.43, 29,782.37 and 12,630.65 is: 17,430.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,581.43 : 29,782.37 = 12,630.65 : x
  2. Step 2: Convert to fraction form
    21,581.43/29,782.37 = 12,630.65/x
  3. Step 3: Cross multiply
    21,581.43x = 29,782.37 × 12,630.65
  4. Step 4: Simplify right side
    21,581.43x = 376,170,479.58
  5. Step 5: Solve for x
    x = 376,170,479.58/21,581.43
  6. Step 6: Final answer
    x = 17,430.29

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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.