Home / 15,679.84-21,638.28-8,606.20

Finding the Fourth Proportional to 15,679.84, 21,638.28 and 8,606.20

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Solution

The fourth proportional to 15,679.84, 21,638.28 and 8,606.20 is: 11,876.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.84 : 21,638.28 = 8,606.20 : x
  2. Step 2: Convert to fraction form
    15,679.84/21,638.28 = 8,606.20/x
  3. Step 3: Cross multiply
    15,679.84x = 21,638.28 × 8,606.20
  4. Step 4: Simplify right side
    15,679.84x = 186,223,365.34
  5. Step 5: Solve for x
    x = 186,223,365.34/15,679.84
  6. Step 6: Final answer
    x = 11,876.61

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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.