Home / 10,905.80-16,358.70-3,979.40

Finding the Fourth Proportional to 10,905.80, 16,358.70 and 3,979.40

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Solution

The fourth proportional to 10,905.80, 16,358.70 and 3,979.40 is: 5,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.80 : 16,358.70 = 3,979.40 : x
  2. Step 2: Convert to fraction form
    10,905.80/16,358.70 = 3,979.40/x
  3. Step 3: Cross multiply
    10,905.80x = 16,358.70 × 3,979.40
  4. Step 4: Simplify right side
    10,905.80x = 65,097,810.78
  5. Step 5: Solve for x
    x = 65,097,810.78/10,905.80
  6. Step 6: Final answer
    x = 5,969.10

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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.