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Finding the Fourth Proportional to 7,720.79, 11,581.15 and 1,877.41

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Solution

The fourth proportional to 7,720.79, 11,581.15 and 1,877.41 is: 2,816.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.79 : 11,581.15 = 1,877.41 : x
  2. Step 2: Convert to fraction form
    7,720.79/11,581.15 = 1,877.41/x
  3. Step 3: Cross multiply
    7,720.79x = 11,581.15 × 1,877.41
  4. Step 4: Simplify right side
    7,720.79x = 21,742,566.82
  5. Step 5: Solve for x
    x = 21,742,566.82/7,720.79
  6. Step 6: Final answer
    x = 2,816.11

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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.