Home / 12,999.20-19,511.60-6,432.80

Finding the Fourth Proportional to 12,999.20, 19,511.60 and 6,432.80

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Solution

The fourth proportional to 12,999.20, 19,511.60 and 6,432.80 is: 9,655.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.20 : 19,511.60 = 6,432.80 : x
  2. Step 2: Convert to fraction form
    12,999.20/19,511.60 = 6,432.80/x
  3. Step 3: Cross multiply
    12,999.20x = 19,511.60 × 6,432.80
  4. Step 4: Simplify right side
    12,999.20x = 125,514,220.48
  5. Step 5: Solve for x
    x = 125,514,220.48/12,999.20
  6. Step 6: Final answer
    x = 9,655.53

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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.