Home / 12,321.04-17,007.96-8,139.28

Finding the Fourth Proportional to 12,321.04, 17,007.96 and 8,139.28

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Solution

The fourth proportional to 12,321.04, 17,007.96 and 8,139.28 is: 11,235.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.04 : 17,007.96 = 8,139.28 : x
  2. Step 2: Convert to fraction form
    12,321.04/17,007.96 = 8,139.28/x
  3. Step 3: Cross multiply
    12,321.04x = 17,007.96 × 8,139.28
  4. Step 4: Simplify right side
    12,321.04x = 138,432,548.67
  5. Step 5: Solve for x
    x = 138,432,548.67/12,321.04
  6. Step 6: Final answer
    x = 11,235.46

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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.