Home / 15,679.56-21,638.36-8,605.80

Finding the Fourth Proportional to 15,679.56, 21,638.36 and 8,605.80

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Solution

The fourth proportional to 15,679.56, 21,638.36 and 8,605.80 is: 11,876.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.56 : 21,638.36 = 8,605.80 : x
  2. Step 2: Convert to fraction form
    15,679.56/21,638.36 = 8,605.80/x
  3. Step 3: Cross multiply
    15,679.56x = 21,638.36 × 8,605.80
  4. Step 4: Simplify right side
    15,679.56x = 186,215,398.49
  5. Step 5: Solve for x
    x = 186,215,398.49/15,679.56
  6. Step 6: Final answer
    x = 11,876.32

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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.