Home / 21,141.44-31,710.30-12,818.99

Finding the Fourth Proportional to 21,141.44, 31,710.30 and 12,818.99

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Solution

The fourth proportional to 21,141.44, 31,710.30 and 12,818.99 is: 19,227.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,141.44 : 31,710.30 = 12,818.99 : x
  2. Step 2: Convert to fraction form
    21,141.44/31,710.30 = 12,818.99/x
  3. Step 3: Cross multiply
    21,141.44x = 31,710.30 × 12,818.99
  4. Step 4: Simplify right side
    21,141.44x = 406,494,018.60
  5. Step 5: Solve for x
    x = 406,494,018.60/21,141.44
  6. Step 6: Final answer
    x = 19,227.36

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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.