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Finding the Fourth Proportional to 6,465.72, 8,920.62 and 3,983.16

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Solution

The fourth proportional to 6,465.72, 8,920.62 and 3,983.16 is: 5,495.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,465.72 : 8,920.62 = 3,983.16 : x
  2. Step 2: Convert to fraction form
    6,465.72/8,920.62 = 3,983.16/x
  3. Step 3: Cross multiply
    6,465.72x = 8,920.62 × 3,983.16
  4. Step 4: Simplify right side
    6,465.72x = 35,532,256.76
  5. Step 5: Solve for x
    x = 35,532,256.76/6,465.72
  6. Step 6: Final answer
    x = 5,495.48

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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.