Home / 28,120.10-42,154.22-14,265.86

Finding the Fourth Proportional to 28,120.10, 42,154.22 and 14,265.86

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Solution

The fourth proportional to 28,120.10, 42,154.22 and 14,265.86 is: 21,385.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.10 : 42,154.22 = 14,265.86 : x
  2. Step 2: Convert to fraction form
    28,120.10/42,154.22 = 14,265.86/x
  3. Step 3: Cross multiply
    28,120.10x = 42,154.22 × 14,265.86
  4. Step 4: Simplify right side
    28,120.10x = 601,366,025.82
  5. Step 5: Solve for x
    x = 601,366,025.82/28,120.10
  6. Step 6: Final answer
    x = 21,385.63

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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.