Home / 20,890.33-31,346.26-13,875.20

Finding the Fourth Proportional to 20,890.33, 31,346.26 and 13,875.20

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Solution

The fourth proportional to 20,890.33, 31,346.26 and 13,875.20 is: 20,819.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.33 : 31,346.26 = 13,875.20 : x
  2. Step 2: Convert to fraction form
    20,890.33/31,346.26 = 13,875.20/x
  3. Step 3: Cross multiply
    20,890.33x = 31,346.26 × 13,875.20
  4. Step 4: Simplify right side
    20,890.33x = 434,935,400.64
  5. Step 5: Solve for x
    x = 434,935,400.64/20,890.33
  6. Step 6: Final answer
    x = 20,819.94

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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.