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Finding the Fourth Proportional to 6,489.16, 8,955.71 and 3,972.93

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Solution

The fourth proportional to 6,489.16, 8,955.71 and 3,972.93 is: 5,483.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.16 : 8,955.71 = 3,972.93 : x
  2. Step 2: Convert to fraction form
    6,489.16/8,955.71 = 3,972.93/x
  3. Step 3: Cross multiply
    6,489.16x = 8,955.71 × 3,972.93
  4. Step 4: Simplify right side
    6,489.16x = 35,580,408.93
  5. Step 5: Solve for x
    x = 35,580,408.93/6,489.16
  6. Step 6: Final answer
    x = 5,483.05

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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.