Home / 12,686.30-17,507.14-7,021.44

Finding the Fourth Proportional to 12,686.30, 17,507.14 and 7,021.44

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Solution

The fourth proportional to 12,686.30, 17,507.14 and 7,021.44 is: 9,689.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.30 : 17,507.14 = 7,021.44 : x
  2. Step 2: Convert to fraction form
    12,686.30/17,507.14 = 7,021.44/x
  3. Step 3: Cross multiply
    12,686.30x = 17,507.14 × 7,021.44
  4. Step 4: Simplify right side
    12,686.30x = 122,925,364.77
  5. Step 5: Solve for x
    x = 122,925,364.77/12,686.30
  6. Step 6: Final answer
    x = 9,689.61

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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.