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Finding the Fourth Proportional to 14,007.52, 19,330.36 and 7,720

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Solution

The fourth proportional to 14,007.52, 19,330.36 and 7,720 is: 10,653.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,007.52 : 19,330.36 = 7,720 : x
  2. Step 2: Convert to fraction form
    14,007.52/19,330.36 = 7,720/x
  3. Step 3: Cross multiply
    14,007.52x = 19,330.36 × 7,720
  4. Step 4: Simplify right side
    14,007.52x = 149,230,379.20
  5. Step 5: Solve for x
    x = 149,230,379.20/14,007.52
  6. Step 6: Final answer
    x = 10,653.59

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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.