Home / 8,427.60-12,638.88-4,272.48

Finding the Fourth Proportional to 8,427.60, 12,638.88 and 4,272.48

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Solution

The fourth proportional to 8,427.60, 12,638.88 and 4,272.48 is: 6,407.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,427.60 : 12,638.88 = 4,272.48 : x
  2. Step 2: Convert to fraction form
    8,427.60/12,638.88 = 4,272.48/x
  3. Step 3: Cross multiply
    8,427.60x = 12,638.88 × 4,272.48
  4. Step 4: Simplify right side
    8,427.60x = 53,999,362.02
  5. Step 5: Solve for x
    x = 53,999,362.02/8,427.60
  6. Step 6: Final answer
    x = 6,407.44

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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.