Home / 21,186.90-31,775.49-6,395.76

Finding the Fourth Proportional to 21,186.90, 31,775.49 and 6,395.76

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Solution

The fourth proportional to 21,186.90, 31,775.49 and 6,395.76 is: 9,592.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.90 : 31,775.49 = 6,395.76 : x
  2. Step 2: Convert to fraction form
    21,186.90/31,775.49 = 6,395.76/x
  3. Step 3: Cross multiply
    21,186.90x = 31,775.49 × 6,395.76
  4. Step 4: Simplify right side
    21,186.90x = 203,228,407.92
  5. Step 5: Solve for x
    x = 203,228,407.92/21,186.90
  6. Step 6: Final answer
    x = 9,592.17

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1.5x scale

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.