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Finding the Fourth Proportional to 3,992.76, 5,509.14 and 2,421.24

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Solution

The fourth proportional to 3,992.76, 5,509.14 and 2,421.24 is: 3,340.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.76 : 5,509.14 = 2,421.24 : x
  2. Step 2: Convert to fraction form
    3,992.76/5,509.14 = 2,421.24/x
  3. Step 3: Cross multiply
    3,992.76x = 5,509.14 × 2,421.24
  4. Step 4: Simplify right side
    3,992.76x = 13,338,950.13
  5. Step 5: Solve for x
    x = 13,338,950.13/3,992.76
  6. Step 6: Final answer
    x = 3,340.78

Related Problems

Find fourth proportional to 1,996.38, 2,754.57 and 1,210.62
Half scale
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Double scale
Find fourth proportional to 3,993.76, 5,510.52 and 2,422.24
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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.