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Finding the Fourth Proportional to 7,965.26, 10,992.40 and 4,428.50

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Solution

The fourth proportional to 7,965.26, 10,992.40 and 4,428.50 is: 6,111.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,965.26 : 10,992.40 = 4,428.50 : x
  2. Step 2: Convert to fraction form
    7,965.26/10,992.40 = 4,428.50/x
  3. Step 3: Cross multiply
    7,965.26x = 10,992.40 × 4,428.50
  4. Step 4: Simplify right side
    7,965.26x = 48,679,843.40
  5. Step 5: Solve for x
    x = 48,679,843.40/7,965.26
  6. Step 6: Final answer
    x = 6,111.52

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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.