Home / 15,710.35-21,679.73-8,636.72

Finding the Fourth Proportional to 15,710.35, 21,679.73 and 8,636.72

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Solution

The fourth proportional to 15,710.35, 21,679.73 and 8,636.72 is: 11,918.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.35 : 21,679.73 = 8,636.72 : x
  2. Step 2: Convert to fraction form
    15,710.35/21,679.73 = 8,636.72/x
  3. Step 3: Cross multiply
    15,710.35x = 21,679.73 × 8,636.72
  4. Step 4: Simplify right side
    15,710.35x = 187,241,757.69
  5. Step 5: Solve for x
    x = 187,241,757.69/15,710.35
  6. Step 6: Final answer
    x = 11,918.37

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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.