Home / 13,421.85-20,138.72-4,663.05

Finding the Fourth Proportional to 13,421.85, 20,138.72 and 4,663.05

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Solution

The fourth proportional to 13,421.85, 20,138.72 and 4,663.05 is: 6,996.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.85 : 20,138.72 = 4,663.05 : x
  2. Step 2: Convert to fraction form
    13,421.85/20,138.72 = 4,663.05/x
  3. Step 3: Cross multiply
    13,421.85x = 20,138.72 × 4,663.05
  4. Step 4: Simplify right side
    13,421.85x = 93,907,834.98
  5. Step 5: Solve for x
    x = 93,907,834.98/13,421.85
  6. Step 6: Final answer
    x = 6,996.64

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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.