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Finding the Fourth Proportional to 7,960.47, 10,985.76 and 5,447.85

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Solution

The fourth proportional to 7,960.47, 10,985.76 and 5,447.85 is: 7,518.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,960.47 : 10,985.76 = 5,447.85 : x
  2. Step 2: Convert to fraction form
    7,960.47/10,985.76 = 5,447.85/x
  3. Step 3: Cross multiply
    7,960.47x = 10,985.76 × 5,447.85
  4. Step 4: Simplify right side
    7,960.47x = 59,848,772.62
  5. Step 5: Solve for x
    x = 59,848,772.62/7,960.47
  6. Step 6: Final answer
    x = 7,518.25

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1.5x scale

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.