Home / 21,290.67-31,939.85-8,803.91

Finding the Fourth Proportional to 21,290.67, 31,939.85 and 8,803.91

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Solution

The fourth proportional to 21,290.67, 31,939.85 and 8,803.91 is: 13,207.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.67 : 31,939.85 = 8,803.91 : x
  2. Step 2: Convert to fraction form
    21,290.67/31,939.85 = 8,803.91/x
  3. Step 3: Cross multiply
    21,290.67x = 31,939.85 × 8,803.91
  4. Step 4: Simplify right side
    21,290.67x = 281,195,666.67
  5. Step 5: Solve for x
    x = 281,195,666.67/21,290.67
  6. Step 6: Final answer
    x = 13,207.46

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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.