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Finding the Fourth Proportional to 29,478.80, 40,670.76 and 18,136.64

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Solution

The fourth proportional to 29,478.80, 40,670.76 and 18,136.64 is: 25,022.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,478.80 : 40,670.76 = 18,136.64 : x
  2. Step 2: Convert to fraction form
    29,478.80/40,670.76 = 18,136.64/x
  3. Step 3: Cross multiply
    29,478.80x = 40,670.76 × 18,136.64
  4. Step 4: Simplify right side
    29,478.80x = 737,630,932.65
  5. Step 5: Solve for x
    x = 737,630,932.65/29,478.80
  6. Step 6: Final answer
    x = 25,022.42

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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.