Home / 28,274.10-42,418.92-12,491.80

Finding the Fourth Proportional to 28,274.10, 42,418.92 and 12,491.80

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Solution

The fourth proportional to 28,274.10, 42,418.92 and 12,491.80 is: 18,741.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,274.10 : 42,418.92 = 12,491.80 : x
  2. Step 2: Convert to fraction form
    28,274.10/42,418.92 = 12,491.80/x
  3. Step 3: Cross multiply
    28,274.10x = 42,418.92 × 12,491.80
  4. Step 4: Simplify right side
    28,274.10x = 529,888,664.86
  5. Step 5: Solve for x
    x = 529,888,664.86/28,274.10
  6. Step 6: Final answer
    x = 18,741.13

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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.