Home / 20,875.90-31,317.30-10,346.41

Finding the Fourth Proportional to 20,875.90, 31,317.30 and 10,346.41

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Solution

The fourth proportional to 20,875.90, 31,317.30 and 10,346.41 is: 15,521.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.90 : 31,317.30 = 10,346.41 : x
  2. Step 2: Convert to fraction form
    20,875.90/31,317.30 = 10,346.41/x
  3. Step 3: Cross multiply
    20,875.90x = 31,317.30 × 10,346.41
  4. Step 4: Simplify right side
    20,875.90x = 324,021,625.89
  5. Step 5: Solve for x
    x = 324,021,625.89/20,875.90
  6. Step 6: Final answer
    x = 15,521.32

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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.