Home / 21,173.16-31,758.12-8,689.98

Finding the Fourth Proportional to 21,173.16, 31,758.12 and 8,689.98

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Solution

The fourth proportional to 21,173.16, 31,758.12 and 8,689.98 is: 13,034.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,173.16 : 31,758.12 = 8,689.98 : x
  2. Step 2: Convert to fraction form
    21,173.16/31,758.12 = 8,689.98/x
  3. Step 3: Cross multiply
    21,173.16x = 31,758.12 × 8,689.98
  4. Step 4: Simplify right side
    21,173.16x = 275,977,427.64
  5. Step 5: Solve for x
    x = 275,977,427.64/21,173.16
  6. Step 6: Final answer
    x = 13,034.31

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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.