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Finding the Fourth Proportional to 28,777.51, 43,172.14 and 12,137.51

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Solution

The fourth proportional to 28,777.51, 43,172.14 and 12,137.51 is: 18,208.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,777.51 : 43,172.14 = 12,137.51 : x
  2. Step 2: Convert to fraction form
    28,777.51/43,172.14 = 12,137.51/x
  3. Step 3: Cross multiply
    28,777.51x = 43,172.14 × 12,137.51
  4. Step 4: Simplify right side
    28,777.51x = 524,002,280.97
  5. Step 5: Solve for x
    x = 524,002,280.97/28,777.51
  6. Step 6: Final answer
    x = 18,208.74

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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.