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Finding the Fourth Proportional to 7,720.03, 11,579.95 and 1,876.65

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Solution

The fourth proportional to 7,720.03, 11,579.95 and 1,876.65 is: 2,814.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.03 : 11,579.95 = 1,876.65 : x
  2. Step 2: Convert to fraction form
    7,720.03/11,579.95 = 1,876.65/x
  3. Step 3: Cross multiply
    7,720.03x = 11,579.95 × 1,876.65
  4. Step 4: Simplify right side
    7,720.03x = 21,731,513.17
  5. Step 5: Solve for x
    x = 21,731,513.17/7,720.03
  6. Step 6: Final answer
    x = 2,814.95

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1.5x scale

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.