Home / 10,905.28-16,358.88-3,980.32

Finding the Fourth Proportional to 10,905.28, 16,358.88 and 3,980.32

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Solution

The fourth proportional to 10,905.28, 16,358.88 and 3,980.32 is: 5,970.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.28 : 16,358.88 = 3,980.32 : x
  2. Step 2: Convert to fraction form
    10,905.28/16,358.88 = 3,980.32/x
  3. Step 3: Cross multiply
    10,905.28x = 16,358.88 × 3,980.32
  4. Step 4: Simplify right side
    10,905.28x = 65,113,577.24
  5. Step 5: Solve for x
    x = 65,113,577.24/10,905.28
  6. Step 6: Final answer
    x = 5,970.83

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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.