Home / 9,147.28-12,621-6,317.16

Finding the Fourth Proportional to 9,147.28, 12,621 and 6,317.16

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Solution

The fourth proportional to 9,147.28, 12,621 and 6,317.16 is: 8,716.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,147.28 : 12,621 = 6,317.16 : x
  2. Step 2: Convert to fraction form
    9,147.28/12,621 = 6,317.16/x
  3. Step 3: Cross multiply
    9,147.28x = 12,621 × 6,317.16
  4. Step 4: Simplify right side
    9,147.28x = 79,728,876.36
  5. Step 5: Solve for x
    x = 79,728,876.36/9,147.28
  6. Step 6: Final answer
    x = 8,716.13

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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.