Home / 20,703.78-31,043.20-9,303.62

Finding the Fourth Proportional to 20,703.78, 31,043.20 and 9,303.62

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Solution

The fourth proportional to 20,703.78, 31,043.20 and 9,303.62 is: 13,949.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.78 : 31,043.20 = 9,303.62 : x
  2. Step 2: Convert to fraction form
    20,703.78/31,043.20 = 9,303.62/x
  3. Step 3: Cross multiply
    20,703.78x = 31,043.20 × 9,303.62
  4. Step 4: Simplify right side
    20,703.78x = 288,814,043.46
  5. Step 5: Solve for x
    x = 288,814,043.46/20,703.78
  6. Step 6: Final answer
    x = 13,949.82

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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.