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Finding the Fourth Proportional to 11,290.81, 15,581.11 and 6,255.01

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Solution

The fourth proportional to 11,290.81, 15,581.11 and 6,255.01 is: 8,631.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,290.81 : 15,581.11 = 6,255.01 : x
  2. Step 2: Convert to fraction form
    11,290.81/15,581.11 = 6,255.01/x
  3. Step 3: Cross multiply
    11,290.81x = 15,581.11 × 6,255.01
  4. Step 4: Simplify right side
    11,290.81x = 97,459,998.86
  5. Step 5: Solve for x
    x = 97,459,998.86/11,290.81
  6. Step 6: Final answer
    x = 8,631.80

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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.