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Finding the Fourth Proportional to 7,762.77, 10,712.89 and 4,405.72

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Solution

The fourth proportional to 7,762.77, 10,712.89 and 4,405.72 is: 6,080.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,762.77 : 10,712.89 = 4,405.72 : x
  2. Step 2: Convert to fraction form
    7,762.77/10,712.89 = 4,405.72/x
  3. Step 3: Cross multiply
    7,762.77x = 10,712.89 × 4,405.72
  4. Step 4: Simplify right side
    7,762.77x = 47,197,993.73
  5. Step 5: Solve for x
    x = 47,197,993.73/7,762.77
  6. Step 6: Final answer
    x = 6,080.05

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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.