Home / 12,686.73-17,506.56-7,021.38

Finding the Fourth Proportional to 12,686.73, 17,506.56 and 7,021.38

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Solution

The fourth proportional to 12,686.73, 17,506.56 and 7,021.38 is: 9,688.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.73 : 17,506.56 = 7,021.38 : x
  2. Step 2: Convert to fraction form
    12,686.73/17,506.56 = 7,021.38/x
  3. Step 3: Cross multiply
    12,686.73x = 17,506.56 × 7,021.38
  4. Step 4: Simplify right side
    12,686.73x = 122,920,302.23
  5. Step 5: Solve for x
    x = 122,920,302.23/12,686.73
  6. Step 6: Final answer
    x = 9,688.89

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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.