Home / 12,920.90-19,380.27-4,153.46

Finding the Fourth Proportional to 12,920.90, 19,380.27 and 4,153.46

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Solution

The fourth proportional to 12,920.90, 19,380.27 and 4,153.46 is: 6,229.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920.90 : 19,380.27 = 4,153.46 : x
  2. Step 2: Convert to fraction form
    12,920.90/19,380.27 = 4,153.46/x
  3. Step 3: Cross multiply
    12,920.90x = 19,380.27 × 4,153.46
  4. Step 4: Simplify right side
    12,920.90x = 80,495,176.23
  5. Step 5: Solve for x
    x = 80,495,176.23/12,920.90
  6. Step 6: Final answer
    x = 6,229.84

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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.