Home / 15,709.67-21,679.36-8,636.55

Finding the Fourth Proportional to 15,709.67, 21,679.36 and 8,636.55

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Solution

The fourth proportional to 15,709.67, 21,679.36 and 8,636.55 is: 11,918.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.67 : 21,679.36 = 8,636.55 : x
  2. Step 2: Convert to fraction form
    15,709.67/21,679.36 = 8,636.55/x
  3. Step 3: Cross multiply
    15,709.67x = 21,679.36 × 8,636.55
  4. Step 4: Simplify right side
    15,709.67x = 187,234,876.61
  5. Step 5: Solve for x
    x = 187,234,876.61/15,709.67
  6. Step 6: Final answer
    x = 11,918.45

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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.