Home / 20,876.90-31,318.80-10,347.41

Finding the Fourth Proportional to 20,876.90, 31,318.80 and 10,347.41

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Solution

The fourth proportional to 20,876.90, 31,318.80 and 10,347.41 is: 15,522.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.90 : 31,318.80 = 10,347.41 : x
  2. Step 2: Convert to fraction form
    20,876.90/31,318.80 = 10,347.41/x
  3. Step 3: Cross multiply
    20,876.90x = 31,318.80 × 10,347.41
  4. Step 4: Simplify right side
    20,876.90x = 324,068,464.31
  5. Step 5: Solve for x
    x = 324,068,464.31/20,876.90
  6. Step 6: Final answer
    x = 15,522.82

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1.5x scale

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.