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Finding the Fourth Proportional to 9,371.04, 12,931.20 and 5,179.20

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Solution

The fourth proportional to 9,371.04, 12,931.20 and 5,179.20 is: 7,146.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,371.04 : 12,931.20 = 5,179.20 : x
  2. Step 2: Convert to fraction form
    9,371.04/12,931.20 = 5,179.20/x
  3. Step 3: Cross multiply
    9,371.04x = 12,931.20 × 5,179.20
  4. Step 4: Simplify right side
    9,371.04x = 66,973,271.04
  5. Step 5: Solve for x
    x = 66,973,271.04/9,371.04
  6. Step 6: Final answer
    x = 7,146.83

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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.