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Finding the Fourth Proportional to 7,688.80, 11,525.10 and 4,394.80

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Solution

The fourth proportional to 7,688.80, 11,525.10 and 4,394.80 is: 6,587.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,688.80 : 11,525.10 = 4,394.80 : x
  2. Step 2: Convert to fraction form
    7,688.80/11,525.10 = 4,394.80/x
  3. Step 3: Cross multiply
    7,688.80x = 11,525.10 × 4,394.80
  4. Step 4: Simplify right side
    7,688.80x = 50,650,509.48
  5. Step 5: Solve for x
    x = 50,650,509.48/7,688.80
  6. Step 6: Final answer
    x = 6,587.57

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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.