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Finding the Fourth Proportional to 7,047.12, 9,725.24 and 3,903.60

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Solution

The fourth proportional to 7,047.12, 9,725.24 and 3,903.60 is: 5,387.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,047.12 : 9,725.24 = 3,903.60 : x
  2. Step 2: Convert to fraction form
    7,047.12/9,725.24 = 3,903.60/x
  3. Step 3: Cross multiply
    7,047.12x = 9,725.24 × 3,903.60
  4. Step 4: Simplify right side
    7,047.12x = 37,963,446.86
  5. Step 5: Solve for x
    x = 37,963,446.86/7,047.12
  6. Step 6: Final answer
    x = 5,387.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.