Home / 10,979.60-16,469.40-5,142.74

Finding the Fourth Proportional to 10,979.60, 16,469.40 and 5,142.74

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Solution

The fourth proportional to 10,979.60, 16,469.40 and 5,142.74 is: 7,714.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.60 : 16,469.40 = 5,142.74 : x
  2. Step 2: Convert to fraction form
    10,979.60/16,469.40 = 5,142.74/x
  3. Step 3: Cross multiply
    10,979.60x = 16,469.40 × 5,142.74
  4. Step 4: Simplify right side
    10,979.60x = 84,697,842.16
  5. Step 5: Solve for x
    x = 84,697,842.16/10,979.60
  6. Step 6: Final answer
    x = 7,714.11

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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.