Home / 28,639.74-42,938.01-18,781.50

Finding the Fourth Proportional to 28,639.74, 42,938.01 and 18,781.50

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Solution

The fourth proportional to 28,639.74, 42,938.01 and 18,781.50 is: 28,158.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639.74 : 42,938.01 = 18,781.50 : x
  2. Step 2: Convert to fraction form
    28,639.74/42,938.01 = 18,781.50/x
  3. Step 3: Cross multiply
    28,639.74x = 42,938.01 × 18,781.50
  4. Step 4: Simplify right side
    28,639.74x = 806,440,234.82
  5. Step 5: Solve for x
    x = 806,440,234.82/28,639.74
  6. Step 6: Final answer
    x = 28,158.09

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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.