Home / 13,120.89-19,683.87-4,238.61

Finding the Fourth Proportional to 13,120.89, 19,683.87 and 4,238.61

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Solution

The fourth proportional to 13,120.89, 19,683.87 and 4,238.61 is: 6,358.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.89 : 19,683.87 = 4,238.61 : x
  2. Step 2: Convert to fraction form
    13,120.89/19,683.87 = 4,238.61/x
  3. Step 3: Cross multiply
    13,120.89x = 19,683.87 × 4,238.61
  4. Step 4: Simplify right side
    13,120.89x = 83,432,248.22
  5. Step 5: Solve for x
    x = 83,432,248.22/13,120.89
  6. Step 6: Final answer
    x = 6,358.73

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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.