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Finding the Fourth Proportional to 5,615.82, 7,741.62 and 3,931.92

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Solution

The fourth proportional to 5,615.82, 7,741.62 and 3,931.92 is: 5,420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.82 : 7,741.62 = 3,931.92 : x
  2. Step 2: Convert to fraction form
    5,615.82/7,741.62 = 3,931.92/x
  3. Step 3: Cross multiply
    5,615.82x = 7,741.62 × 3,931.92
  4. Step 4: Simplify right side
    5,615.82x = 30,439,430.51
  5. Step 5: Solve for x
    x = 30,439,430.51/5,615.82
  6. Step 6: Final answer
    x = 5,420.30

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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.