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Finding the Fourth Proportional to 4,687.20, 7,022.70 and 4,039.20

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Solution

The fourth proportional to 4,687.20, 7,022.70 and 4,039.20 is: 6,051.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,687.20 : 7,022.70 = 4,039.20 : x
  2. Step 2: Convert to fraction form
    4,687.20/7,022.70 = 4,039.20/x
  3. Step 3: Cross multiply
    4,687.20x = 7,022.70 × 4,039.20
  4. Step 4: Simplify right side
    4,687.20x = 28,366,089.84
  5. Step 5: Solve for x
    x = 28,366,089.84/4,687.20
  6. Step 6: Final answer
    x = 6,051.82

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1.5x scale

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.