Home / 20,876.58-31,293-15,321.60

Finding the Fourth Proportional to 20,876.58, 31,293 and 15,321.60

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Solution

The fourth proportional to 20,876.58, 31,293 and 15,321.60 is: 22,966.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.58 : 31,293 = 15,321.60 : x
  2. Step 2: Convert to fraction form
    20,876.58/31,293 = 15,321.60/x
  3. Step 3: Cross multiply
    20,876.58x = 31,293 × 15,321.60
  4. Step 4: Simplify right side
    20,876.58x = 479,458,828.80
  5. Step 5: Solve for x
    x = 479,458,828.80/20,876.58
  6. Step 6: Final answer
    x = 22,966.35

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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.