Home / 21,102.08-31,677.56-12,343.28

Finding the Fourth Proportional to 21,102.08, 31,677.56 and 12,343.28

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Solution

The fourth proportional to 21,102.08, 31,677.56 and 12,343.28 is: 18,529.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.08 : 31,677.56 = 12,343.28 : x
  2. Step 2: Convert to fraction form
    21,102.08/31,677.56 = 12,343.28/x
  3. Step 3: Cross multiply
    21,102.08x = 31,677.56 × 12,343.28
  4. Step 4: Simplify right side
    21,102.08x = 391,004,992.80
  5. Step 5: Solve for x
    x = 391,004,992.80/21,102.08
  6. Step 6: Final answer
    x = 18,529.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.