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Finding the Fourth Proportional to 8,700.30, 13,043.25 and 4,320.81

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Solution

The fourth proportional to 8,700.30, 13,043.25 and 4,320.81 is: 6,477.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.30 : 13,043.25 = 4,320.81 : x
  2. Step 2: Convert to fraction form
    8,700.30/13,043.25 = 4,320.81/x
  3. Step 3: Cross multiply
    8,700.30x = 13,043.25 × 4,320.81
  4. Step 4: Simplify right side
    8,700.30x = 56,357,405.03
  5. Step 5: Solve for x
    x = 56,357,405.03/8,700.30
  6. Step 6: Final answer
    x = 6,477.64

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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.