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Finding the Fourth Proportional to 28,776.51, 43,170.64 and 12,136.51

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Solution

The fourth proportional to 28,776.51, 43,170.64 and 12,136.51 is: 18,207.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,776.51 : 43,170.64 = 12,136.51 : x
  2. Step 2: Convert to fraction form
    28,776.51/43,170.64 = 12,136.51/x
  3. Step 3: Cross multiply
    28,776.51x = 43,170.64 × 12,136.51
  4. Step 4: Simplify right side
    28,776.51x = 523,940,927.69
  5. Step 5: Solve for x
    x = 523,940,927.69/28,776.51
  6. Step 6: Final answer
    x = 18,207.24

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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.