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Finding the Fourth Proportional to 28,497.98, 42,749.39 and 7,440.81

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Solution

The fourth proportional to 28,497.98, 42,749.39 and 7,440.81 is: 11,161.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497.98 : 42,749.39 = 7,440.81 : x
  2. Step 2: Convert to fraction form
    28,497.98/42,749.39 = 7,440.81/x
  3. Step 3: Cross multiply
    28,497.98x = 42,749.39 × 7,440.81
  4. Step 4: Simplify right side
    28,497.98x = 318,090,107.21
  5. Step 5: Solve for x
    x = 318,090,107.21/28,497.98
  6. Step 6: Final answer
    x = 11,161.85

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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.