Home / 21,618.41-29,840.04-12,668.79

Finding the Fourth Proportional to 21,618.41, 29,840.04 and 12,668.79

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Solution

The fourth proportional to 21,618.41, 29,840.04 and 12,668.79 is: 17,486.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.41 : 29,840.04 = 12,668.79 : x
  2. Step 2: Convert to fraction form
    21,618.41/29,840.04 = 12,668.79/x
  3. Step 3: Cross multiply
    21,618.41x = 29,840.04 × 12,668.79
  4. Step 4: Simplify right side
    21,618.41x = 378,037,200.35
  5. Step 5: Solve for x
    x = 378,037,200.35/21,618.41
  6. Step 6: Final answer
    x = 17,486.82

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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.