Home / 15,742.10-21,721.95-8,668.91

Finding the Fourth Proportional to 15,742.10, 21,721.95 and 8,668.91

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Solution

The fourth proportional to 15,742.10, 21,721.95 and 8,668.91 is: 11,961.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.10 : 21,721.95 = 8,668.91 : x
  2. Step 2: Convert to fraction form
    15,742.10/21,721.95 = 8,668.91/x
  3. Step 3: Cross multiply
    15,742.10x = 21,721.95 × 8,668.91
  4. Step 4: Simplify right side
    15,742.10x = 188,305,520.96
  5. Step 5: Solve for x
    x = 188,305,520.96/15,742.10
  6. Step 6: Final answer
    x = 11,961.91

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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.