Home / 10,509.60-15,764.40-3,115.20

Finding the Fourth Proportional to 10,509.60, 15,764.40 and 3,115.20

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Solution

The fourth proportional to 10,509.60, 15,764.40 and 3,115.20 is: 4,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,509.60 : 15,764.40 = 3,115.20 : x
  2. Step 2: Convert to fraction form
    10,509.60/15,764.40 = 3,115.20/x
  3. Step 3: Cross multiply
    10,509.60x = 15,764.40 × 3,115.20
  4. Step 4: Simplify right side
    10,509.60x = 49,109,258.88
  5. Step 5: Solve for x
    x = 49,109,258.88/10,509.60
  6. Step 6: Final answer
    x = 4,672.80

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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.