Home / 10,861.49-14,991.20-6,613.96

Finding the Fourth Proportional to 10,861.49, 14,991.20 and 6,613.96

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Solution

The fourth proportional to 10,861.49, 14,991.20 and 6,613.96 is: 9,128.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,861.49 : 14,991.20 = 6,613.96 : x
  2. Step 2: Convert to fraction form
    10,861.49/14,991.20 = 6,613.96/x
  3. Step 3: Cross multiply
    10,861.49x = 14,991.20 × 6,613.96
  4. Step 4: Simplify right side
    10,861.49x = 99,151,197.15
  5. Step 5: Solve for x
    x = 99,151,197.15/10,861.49
  6. Step 6: Final answer
    x = 9,128.69

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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.