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Finding the Fourth Proportional to 28,959.80, 43,391.10 and 14,136.80

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Solution

The fourth proportional to 28,959.80, 43,391.10 and 14,136.80 is: 21,181.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,959.80 : 43,391.10 = 14,136.80 : x
  2. Step 2: Convert to fraction form
    28,959.80/43,391.10 = 14,136.80/x
  3. Step 3: Cross multiply
    28,959.80x = 43,391.10 × 14,136.80
  4. Step 4: Simplify right side
    28,959.80x = 613,411,302.48
  5. Step 5: Solve for x
    x = 613,411,302.48/28,959.80
  6. Step 6: Final answer
    x = 21,181.48

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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.