Home / 9,314.40-12,857.20-6,171.60

Finding the Fourth Proportional to 9,314.40, 12,857.20 and 6,171.60

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Solution

The fourth proportional to 9,314.40, 12,857.20 and 6,171.60 is: 8,519.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,314.40 : 12,857.20 = 6,171.60 : x
  2. Step 2: Convert to fraction form
    9,314.40/12,857.20 = 6,171.60/x
  3. Step 3: Cross multiply
    9,314.40x = 12,857.20 × 6,171.60
  4. Step 4: Simplify right side
    9,314.40x = 79,349,495.52
  5. Step 5: Solve for x
    x = 79,349,495.52/9,314.40
  6. Step 6: Final answer
    x = 8,519.01

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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.