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Finding the Fourth Proportional to 9,145.71, 12,621.02 and 5,167.60

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Solution

The fourth proportional to 9,145.71, 12,621.02 and 5,167.60 is: 7,131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,145.71 : 12,621.02 = 5,167.60 : x
  2. Step 2: Convert to fraction form
    9,145.71/12,621.02 = 5,167.60/x
  3. Step 3: Cross multiply
    9,145.71x = 12,621.02 × 5,167.60
  4. Step 4: Simplify right side
    9,145.71x = 65,220,325.56
  5. Step 5: Solve for x
    x = 65,220,325.56/9,145.71
  6. Step 6: Final answer
    x = 7,131.25

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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.