Home / 15,678.82-21,638.10-8,606.44

Finding the Fourth Proportional to 15,678.82, 21,638.10 and 8,606.44

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Solution

The fourth proportional to 15,678.82, 21,638.10 and 8,606.44 is: 11,877.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.82 : 21,638.10 = 8,606.44 : x
  2. Step 2: Convert to fraction form
    15,678.82/21,638.10 = 8,606.44/x
  3. Step 3: Cross multiply
    15,678.82x = 21,638.10 × 8,606.44
  4. Step 4: Simplify right side
    15,678.82x = 186,227,009.36
  5. Step 5: Solve for x
    x = 186,227,009.36/15,678.82
  6. Step 6: Final answer
    x = 11,877.62

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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.