Home / 21,157.07-31,735.91-8,005.91

Finding the Fourth Proportional to 21,157.07, 31,735.91 and 8,005.91

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Solution

The fourth proportional to 21,157.07, 31,735.91 and 8,005.91 is: 12,008.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.07 : 31,735.91 = 8,005.91 : x
  2. Step 2: Convert to fraction form
    21,157.07/31,735.91 = 8,005.91/x
  3. Step 3: Cross multiply
    21,157.07x = 31,735.91 × 8,005.91
  4. Step 4: Simplify right side
    21,157.07x = 254,074,700.56
  5. Step 5: Solve for x
    x = 254,074,700.56/21,157.07
  6. Step 6: Final answer
    x = 12,008.98

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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.