Home / 20,458.85-30,688.28-6,421.04

Finding the Fourth Proportional to 20,458.85, 30,688.28 and 6,421.04

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Solution

The fourth proportional to 20,458.85, 30,688.28 and 6,421.04 is: 9,631.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,458.85 : 30,688.28 = 6,421.04 : x
  2. Step 2: Convert to fraction form
    20,458.85/30,688.28 = 6,421.04/x
  3. Step 3: Cross multiply
    20,458.85x = 30,688.28 × 6,421.04
  4. Step 4: Simplify right side
    20,458.85x = 197,050,673.41
  5. Step 5: Solve for x
    x = 197,050,673.41/20,458.85
  6. Step 6: Final answer
    x = 9,631.56

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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.