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Finding the Fourth Proportional to 9,720.67, 14,505.15 and 8,673.47

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Solution

The fourth proportional to 9,720.67, 14,505.15 and 8,673.47 is: 12,942.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,720.67 : 14,505.15 = 8,673.47 : x
  2. Step 2: Convert to fraction form
    9,720.67/14,505.15 = 8,673.47/x
  3. Step 3: Cross multiply
    9,720.67x = 14,505.15 × 8,673.47
  4. Step 4: Simplify right side
    9,720.67x = 125,809,983.37
  5. Step 5: Solve for x
    x = 125,809,983.37/9,720.67
  6. Step 6: Final answer
    x = 12,942.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.