Home / 20,830.40-31,250.55-6,790.52

Finding the Fourth Proportional to 20,830.40, 31,250.55 and 6,790.52

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Solution

The fourth proportional to 20,830.40, 31,250.55 and 6,790.52 is: 10,187.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.40 : 31,250.55 = 6,790.52 : x
  2. Step 2: Convert to fraction form
    20,830.40/31,250.55 = 6,790.52/x
  3. Step 3: Cross multiply
    20,830.40x = 31,250.55 × 6,790.52
  4. Step 4: Simplify right side
    20,830.40x = 212,207,484.79
  5. Step 5: Solve for x
    x = 212,207,484.79/20,830.40
  6. Step 6: Final answer
    x = 10,187.39

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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.