Home / 21,000.61-31,435.74-15,704.41

Finding the Fourth Proportional to 21,000.61, 31,435.74 and 15,704.41

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Solution

The fourth proportional to 21,000.61, 31,435.74 and 15,704.41 is: 23,507.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.61 : 31,435.74 = 15,704.41 : x
  2. Step 2: Convert to fraction form
    21,000.61/31,435.74 = 15,704.41/x
  3. Step 3: Cross multiply
    21,000.61x = 31,435.74 × 15,704.41
  4. Step 4: Simplify right side
    21,000.61x = 493,679,749.61
  5. Step 5: Solve for x
    x = 493,679,749.61/21,000.61
  6. Step 6: Final answer
    x = 23,507.88

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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.