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Finding the Fourth Proportional to 8,507.43, 12,739.28 and 5,210.53

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Solution

The fourth proportional to 8,507.43, 12,739.28 and 5,210.53 is: 7,802.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,507.43 : 12,739.28 = 5,210.53 : x
  2. Step 2: Convert to fraction form
    8,507.43/12,739.28 = 5,210.53/x
  3. Step 3: Cross multiply
    8,507.43x = 12,739.28 × 5,210.53
  4. Step 4: Simplify right side
    8,507.43x = 66,378,342.72
  5. Step 5: Solve for x
    x = 66,378,342.72/8,507.43
  6. Step 6: Final answer
    x = 7,802.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.