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Finding the Fourth Proportional to 12,709.50, 17,539.11 and 7,741.50

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Solution

The fourth proportional to 12,709.50, 17,539.11 and 7,741.50 is: 10,683.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,709.50 : 17,539.11 = 7,741.50 : x
  2. Step 2: Convert to fraction form
    12,709.50/17,539.11 = 7,741.50/x
  3. Step 3: Cross multiply
    12,709.50x = 17,539.11 × 7,741.50
  4. Step 4: Simplify right side
    12,709.50x = 135,779,020.07
  5. Step 5: Solve for x
    x = 135,779,020.07/12,709.50
  6. Step 6: Final answer
    x = 10,683.27

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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.