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Finding the Fourth Proportional to 13,581, 18,741.51 and 7,613.19

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Solution

The fourth proportional to 13,581, 18,741.51 and 7,613.19 is: 10,506.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581 : 18,741.51 = 7,613.19 : x
  2. Step 2: Convert to fraction form
    13,581/18,741.51 = 7,613.19/x
  3. Step 3: Cross multiply
    13,581x = 18,741.51 × 7,613.19
  4. Step 4: Simplify right side
    13,581x = 142,682,676.52
  5. Step 5: Solve for x
    x = 142,682,676.52/13,581
  6. Step 6: Final answer
    x = 10,506.05

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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.