Home / 8,518.40-12,770.10-3,320.63

Finding the Fourth Proportional to 8,518.40, 12,770.10 and 3,320.63

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Solution

The fourth proportional to 8,518.40, 12,770.10 and 3,320.63 is: 4,978.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,518.40 : 12,770.10 = 3,320.63 : x
  2. Step 2: Convert to fraction form
    8,518.40/12,770.10 = 3,320.63/x
  3. Step 3: Cross multiply
    8,518.40x = 12,770.10 × 3,320.63
  4. Step 4: Simplify right side
    8,518.40x = 42,404,777.16
  5. Step 5: Solve for x
    x = 42,404,777.16/8,518.40
  6. Step 6: Final answer
    x = 4,978.02

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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.