Home / 10,679.20-15,999.60-6,570.40

Finding the Fourth Proportional to 10,679.20, 15,999.60 and 6,570.40

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Solution

The fourth proportional to 10,679.20, 15,999.60 and 6,570.40 is: 9,843.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,679.20 : 15,999.60 = 6,570.40 : x
  2. Step 2: Convert to fraction form
    10,679.20/15,999.60 = 6,570.40/x
  3. Step 3: Cross multiply
    10,679.20x = 15,999.60 × 6,570.40
  4. Step 4: Simplify right side
    10,679.20x = 105,123,771.84
  5. Step 5: Solve for x
    x = 105,123,771.84/10,679.20
  6. Step 6: Final answer
    x = 9,843.79

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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.