Home / 21,310.16-31,979.84-7,459.20

Finding the Fourth Proportional to 21,310.16, 31,979.84 and 7,459.20

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Solution

The fourth proportional to 21,310.16, 31,979.84 and 7,459.20 is: 11,193.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,310.16 : 31,979.84 = 7,459.20 : x
  2. Step 2: Convert to fraction form
    21,310.16/31,979.84 = 7,459.20/x
  3. Step 3: Cross multiply
    21,310.16x = 31,979.84 × 7,459.20
  4. Step 4: Simplify right side
    21,310.16x = 238,544,022.53
  5. Step 5: Solve for x
    x = 238,544,022.53/21,310.16
  6. Step 6: Final answer
    x = 11,193.91

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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.