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Finding the Fourth Proportional to 7,112.80, 10,644.90 and 6,529.60

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Solution

The fourth proportional to 7,112.80, 10,644.90 and 6,529.60 is: 9,772.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.80 : 10,644.90 = 6,529.60 : x
  2. Step 2: Convert to fraction form
    7,112.80/10,644.90 = 6,529.60/x
  3. Step 3: Cross multiply
    7,112.80x = 10,644.90 × 6,529.60
  4. Step 4: Simplify right side
    7,112.80x = 69,506,939.04
  5. Step 5: Solve for x
    x = 69,506,939.04/7,112.80
  6. Step 6: Final answer
    x = 9,772.09

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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.