Home / 8,385.60-12,570.40-3,119.20

Finding the Fourth Proportional to 8,385.60, 12,570.40 and 3,119.20

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Solution

The fourth proportional to 8,385.60, 12,570.40 and 3,119.20 is: 4,675.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,385.60 : 12,570.40 = 3,119.20 : x
  2. Step 2: Convert to fraction form
    8,385.60/12,570.40 = 3,119.20/x
  3. Step 3: Cross multiply
    8,385.60x = 12,570.40 × 3,119.20
  4. Step 4: Simplify right side
    8,385.60x = 39,209,591.68
  5. Step 5: Solve for x
    x = 39,209,591.68/8,385.60
  6. Step 6: Final answer
    x = 4,675.82

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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.