Home / 9,410.50-12,986.90-5,218.75

Finding the Fourth Proportional to 9,410.50, 12,986.90 and 5,218.75

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Solution

The fourth proportional to 9,410.50, 12,986.90 and 5,218.75 is: 7,202.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,410.50 : 12,986.90 = 5,218.75 : x
  2. Step 2: Convert to fraction form
    9,410.50/12,986.90 = 5,218.75/x
  3. Step 3: Cross multiply
    9,410.50x = 12,986.90 × 5,218.75
  4. Step 4: Simplify right side
    9,410.50x = 67,775,384.38
  5. Step 5: Solve for x
    x = 67,775,384.38/9,410.50
  6. Step 6: Final answer
    x = 7,202.10

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Half scale
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Double scale
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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.