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Finding the Fourth Proportional to 29,085.90, 43,632.90 and 12,445.80

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Solution

The fourth proportional to 29,085.90, 43,632.90 and 12,445.80 is: 18,670.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,085.90 : 43,632.90 = 12,445.80 : x
  2. Step 2: Convert to fraction form
    29,085.90/43,632.90 = 12,445.80/x
  3. Step 3: Cross multiply
    29,085.90x = 43,632.90 × 12,445.80
  4. Step 4: Simplify right side
    29,085.90x = 543,046,346.82
  5. Step 5: Solve for x
    x = 543,046,346.82/29,085.90
  6. Step 6: Final answer
    x = 18,670.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.