Home / 11,312.20-16,979.10-5,771.80

Finding the Fourth Proportional to 11,312.20, 16,979.10 and 5,771.80

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Solution

The fourth proportional to 11,312.20, 16,979.10 and 5,771.80 is: 8,663.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,312.20 : 16,979.10 = 5,771.80 : x
  2. Step 2: Convert to fraction form
    11,312.20/16,979.10 = 5,771.80/x
  3. Step 3: Cross multiply
    11,312.20x = 16,979.10 × 5,771.80
  4. Step 4: Simplify right side
    11,312.20x = 97,999,969.38
  5. Step 5: Solve for x
    x = 97,999,969.38/11,312.20
  6. Step 6: Final answer
    x = 8,663.21

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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.