Home / 20,890.68-31,300.83-10,346.64

Finding the Fourth Proportional to 20,890.68, 31,300.83 and 10,346.64

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Solution

The fourth proportional to 20,890.68, 31,300.83 and 10,346.64 is: 15,502.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.68 : 31,300.83 = 10,346.64 : x
  2. Step 2: Convert to fraction form
    20,890.68/31,300.83 = 10,346.64/x
  3. Step 3: Cross multiply
    20,890.68x = 31,300.83 × 10,346.64
  4. Step 4: Simplify right side
    20,890.68x = 323,858,419.71
  5. Step 5: Solve for x
    x = 323,858,419.71/20,890.68
  6. Step 6: Final answer
    x = 15,502.53

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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.