Home / 12,971.31-19,459.80-4,207.11

Finding the Fourth Proportional to 12,971.31, 19,459.80 and 4,207.11

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Solution

The fourth proportional to 12,971.31, 19,459.80 and 4,207.11 is: 6,311.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,971.31 : 19,459.80 = 4,207.11 : x
  2. Step 2: Convert to fraction form
    12,971.31/19,459.80 = 4,207.11/x
  3. Step 3: Cross multiply
    12,971.31x = 19,459.80 × 4,207.11
  4. Step 4: Simplify right side
    12,971.31x = 81,869,519.18
  5. Step 5: Solve for x
    x = 81,869,519.18/12,971.31
  6. Step 6: Final answer
    x = 6,311.58

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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.