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Finding the Fourth Proportional to 7,178.61, 10,772.09 and 3,018.30

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Solution

The fourth proportional to 7,178.61, 10,772.09 and 3,018.30 is: 4,529.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,178.61 : 10,772.09 = 3,018.30 : x
  2. Step 2: Convert to fraction form
    7,178.61/10,772.09 = 3,018.30/x
  3. Step 3: Cross multiply
    7,178.61x = 10,772.09 × 3,018.30
  4. Step 4: Simplify right side
    7,178.61x = 32,513,399.25
  5. Step 5: Solve for x
    x = 32,513,399.25/7,178.61
  6. Step 6: Final answer
    x = 4,529.21

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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.