Home / 13,421.66-20,120.15-4,650.42

Finding the Fourth Proportional to 13,421.66, 20,120.15 and 4,650.42

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Solution

The fourth proportional to 13,421.66, 20,120.15 and 4,650.42 is: 6,971.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.66 : 20,120.15 = 4,650.42 : x
  2. Step 2: Convert to fraction form
    13,421.66/20,120.15 = 4,650.42/x
  3. Step 3: Cross multiply
    13,421.66x = 20,120.15 × 4,650.42
  4. Step 4: Simplify right side
    13,421.66x = 93,567,124.71
  5. Step 5: Solve for x
    x = 93,567,124.71/13,421.66
  6. Step 6: Final answer
    x = 6,971.36

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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.