Home / 11,821.08-16,312.72-6,516

Finding the Fourth Proportional to 11,821.08, 16,312.72 and 6,516

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Solution

The fourth proportional to 11,821.08, 16,312.72 and 6,516 is: 8,991.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,821.08 : 16,312.72 = 6,516 : x
  2. Step 2: Convert to fraction form
    11,821.08/16,312.72 = 6,516/x
  3. Step 3: Cross multiply
    11,821.08x = 16,312.72 × 6,516
  4. Step 4: Simplify right side
    11,821.08x = 106,293,683.52
  5. Step 5: Solve for x
    x = 106,293,683.52/11,821.08
  6. Step 6: Final answer
    x = 8,991.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.