Home / 7,176.30-9,903.44-3,989.87

Finding the Fourth Proportional to 7,176.30, 9,903.44 and 3,989.87

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Solution

The fourth proportional to 7,176.30, 9,903.44 and 3,989.87 is: 5,506.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,176.30 : 9,903.44 = 3,989.87 : x
  2. Step 2: Convert to fraction form
    7,176.30/9,903.44 = 3,989.87/x
  3. Step 3: Cross multiply
    7,176.30x = 9,903.44 × 3,989.87
  4. Step 4: Simplify right side
    7,176.30x = 39,513,368.69
  5. Step 5: Solve for x
    x = 39,513,368.69/7,176.30
  6. Step 6: Final answer
    x = 5,506.09

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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.