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Finding the Fourth Proportional to 6,485.29, 8,985.84 and 6,345.16

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Solution

The fourth proportional to 6,485.29, 8,985.84 and 6,345.16 is: 8,791.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,485.29 : 8,985.84 = 6,345.16 : x
  2. Step 2: Convert to fraction form
    6,485.29/8,985.84 = 6,345.16/x
  3. Step 3: Cross multiply
    6,485.29x = 8,985.84 × 6,345.16
  4. Step 4: Simplify right side
    6,485.29x = 57,016,592.53
  5. Step 5: Solve for x
    x = 57,016,592.53/6,485.29
  6. Step 6: Final answer
    x = 8,791.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.