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Finding the Fourth Proportional to 8,642.72, 11,927.91 and 4,865.99

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Solution

The fourth proportional to 8,642.72, 11,927.91 and 4,865.99 is: 6,715.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.72 : 11,927.91 = 4,865.99 : x
  2. Step 2: Convert to fraction form
    8,642.72/11,927.91 = 4,865.99/x
  3. Step 3: Cross multiply
    8,642.72x = 11,927.91 × 4,865.99
  4. Step 4: Simplify right side
    8,642.72x = 58,041,090.78
  5. Step 5: Solve for x
    x = 58,041,090.78/8,642.72
  6. Step 6: Final answer
    x = 6,715.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.