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Finding the Fourth Proportional to 28,900.78, 43,360.42 and 12,274.78

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Solution

The fourth proportional to 28,900.78, 43,360.42 and 12,274.78 is: 18,416.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,900.78 : 43,360.42 = 12,274.78 : x
  2. Step 2: Convert to fraction form
    28,900.78/43,360.42 = 12,274.78/x
  3. Step 3: Cross multiply
    28,900.78x = 43,360.42 × 12,274.78
  4. Step 4: Simplify right side
    28,900.78x = 532,239,616.21
  5. Step 5: Solve for x
    x = 532,239,616.21/28,900.78
  6. Step 6: Final answer
    x = 18,416.10

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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.