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Finding the Fourth Proportional to 11,762.40, 17,643.48 and 3,971.16

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Solution

The fourth proportional to 11,762.40, 17,643.48 and 3,971.16 is: 5,956.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,762.40 : 17,643.48 = 3,971.16 : x
  2. Step 2: Convert to fraction form
    11,762.40/17,643.48 = 3,971.16/x
  3. Step 3: Cross multiply
    11,762.40x = 17,643.48 × 3,971.16
  4. Step 4: Simplify right side
    11,762.40x = 70,065,082.04
  5. Step 5: Solve for x
    x = 70,065,082.04/11,762.40
  6. Step 6: Final answer
    x = 5,956.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.