Home / 12,688.21-17,509.49-7,022.96

Finding the Fourth Proportional to 12,688.21, 17,509.49 and 7,022.96

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Solution

The fourth proportional to 12,688.21, 17,509.49 and 7,022.96 is: 9,691.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.21 : 17,509.49 = 7,022.96 : x
  2. Step 2: Convert to fraction form
    12,688.21/17,509.49 = 7,022.96/x
  3. Step 3: Cross multiply
    12,688.21x = 17,509.49 × 7,022.96
  4. Step 4: Simplify right side
    12,688.21x = 122,968,456.55
  5. Step 5: Solve for x
    x = 122,968,456.55/12,688.21
  6. Step 6: Final answer
    x = 9,691.55

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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.