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Finding the Fourth Proportional to 6,489.68, 8,955.68 and 3,695.16

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Solution

The fourth proportional to 6,489.68, 8,955.68 and 3,695.16 is: 5,099.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.68 : 8,955.68 = 3,695.16 : x
  2. Step 2: Convert to fraction form
    6,489.68/8,955.68 = 3,695.16/x
  3. Step 3: Cross multiply
    6,489.68x = 8,955.68 × 3,695.16
  4. Step 4: Simplify right side
    6,489.68x = 33,092,670.51
  5. Step 5: Solve for x
    x = 33,092,670.51/6,489.68
  6. Step 6: Final answer
    x = 5,099.28

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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.