Home / 28,916.78-43,379.40-12,276.80

Finding the Fourth Proportional to 28,916.78, 43,379.40 and 12,276.80

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Solution

The fourth proportional to 28,916.78, 43,379.40 and 12,276.80 is: 18,417.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,916.78 : 43,379.40 = 12,276.80 : x
  2. Step 2: Convert to fraction form
    28,916.78/43,379.40 = 12,276.80/x
  3. Step 3: Cross multiply
    28,916.78x = 43,379.40 × 12,276.80
  4. Step 4: Simplify right side
    28,916.78x = 532,560,217.92
  5. Step 5: Solve for x
    x = 532,560,217.92/28,916.78
  6. Step 6: Final answer
    x = 18,417.00

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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.