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Finding the Fourth Proportional to 19,313.64, 28,955.88 and 7,623.72

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Solution

The fourth proportional to 19,313.64, 28,955.88 and 7,623.72 is: 11,429.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,313.64 : 28,955.88 = 7,623.72 : x
  2. Step 2: Convert to fraction form
    19,313.64/28,955.88 = 7,623.72/x
  3. Step 3: Cross multiply
    19,313.64x = 28,955.88 × 7,623.72
  4. Step 4: Simplify right side
    19,313.64x = 220,751,521.47
  5. Step 5: Solve for x
    x = 220,751,521.47/19,313.64
  6. Step 6: Final answer
    x = 11,429.82

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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.