Home / 15,679.88-21,638.40-8,606.15

Finding the Fourth Proportional to 15,679.88, 21,638.40 and 8,606.15

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Solution

The fourth proportional to 15,679.88, 21,638.40 and 8,606.15 is: 11,876.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.88 : 21,638.40 = 8,606.15 : x
  2. Step 2: Convert to fraction form
    15,679.88/21,638.40 = 8,606.15/x
  3. Step 3: Cross multiply
    15,679.88x = 21,638.40 × 8,606.15
  4. Step 4: Simplify right side
    15,679.88x = 186,223,316.16
  5. Step 5: Solve for x
    x = 186,223,316.16/15,679.88
  6. Step 6: Final answer
    x = 11,876.58

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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.