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Finding the Fourth Proportional to 7,961.77, 10,987.61 and 4,424.77

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Solution

The fourth proportional to 7,961.77, 10,987.61 and 4,424.77 is: 6,106.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.77 : 10,987.61 = 4,424.77 : x
  2. Step 2: Convert to fraction form
    7,961.77/10,987.61 = 4,424.77/x
  3. Step 3: Cross multiply
    7,961.77x = 10,987.61 × 4,424.77
  4. Step 4: Simplify right side
    7,961.77x = 48,617,597.51
  5. Step 5: Solve for x
    x = 48,617,597.51/7,961.77
  6. Step 6: Final answer
    x = 6,106.38

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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.