Home / 18,919.17-28,376.73-5,780.70

Finding the Fourth Proportional to 18,919.17, 28,376.73 and 5,780.70

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Solution

The fourth proportional to 18,919.17, 28,376.73 and 5,780.70 is: 8,670.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,919.17 : 28,376.73 = 5,780.70 : x
  2. Step 2: Convert to fraction form
    18,919.17/28,376.73 = 5,780.70/x
  3. Step 3: Cross multiply
    18,919.17x = 28,376.73 × 5,780.70
  4. Step 4: Simplify right side
    18,919.17x = 164,037,363.11
  5. Step 5: Solve for x
    x = 164,037,363.11/18,919.17
  6. Step 6: Final answer
    x = 8,670.43

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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.