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Finding the Fourth Proportional to 18,999.96, 28,495.86 and 7,311

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Solution

The fourth proportional to 18,999.96, 28,495.86 and 7,311 is: 10,964.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.96 : 28,495.86 = 7,311 : x
  2. Step 2: Convert to fraction form
    18,999.96/28,495.86 = 7,311/x
  3. Step 3: Cross multiply
    18,999.96x = 28,495.86 × 7,311
  4. Step 4: Simplify right side
    18,999.96x = 208,333,232.46
  5. Step 5: Solve for x
    x = 208,333,232.46/18,999.96
  6. Step 6: Final answer
    x = 10,964.93

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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.