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Finding the Fourth Proportional to 8,681.31, 11,980.21 and 4,904.48

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Solution

The fourth proportional to 8,681.31, 11,980.21 and 4,904.48 is: 6,768.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,681.31 : 11,980.21 = 4,904.48 : x
  2. Step 2: Convert to fraction form
    8,681.31/11,980.21 = 4,904.48/x
  3. Step 3: Cross multiply
    8,681.31x = 11,980.21 × 4,904.48
  4. Step 4: Simplify right side
    8,681.31x = 58,756,718.03
  5. Step 5: Solve for x
    x = 58,756,718.03/8,681.31
  6. Step 6: Final answer
    x = 6,768.19

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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.