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Finding the Fourth Proportional to 7,689.60, 11,525.12 and 4,405.12

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Solution

The fourth proportional to 7,689.60, 11,525.12 and 4,405.12 is: 6,602.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,689.60 : 11,525.12 = 4,405.12 : x
  2. Step 2: Convert to fraction form
    7,689.60/11,525.12 = 4,405.12/x
  3. Step 3: Cross multiply
    7,689.60x = 11,525.12 × 4,405.12
  4. Step 4: Simplify right side
    7,689.60x = 50,769,536.61
  5. Step 5: Solve for x
    x = 50,769,536.61/7,689.60
  6. Step 6: Final answer
    x = 6,602.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.