Home / 7,618.90-11,429.78-3,459.21

Finding the Fourth Proportional to 7,618.90, 11,429.78 and 3,459.21

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Solution

The fourth proportional to 7,618.90, 11,429.78 and 3,459.21 is: 5,189.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,618.90 : 11,429.78 = 3,459.21 : x
  2. Step 2: Convert to fraction form
    7,618.90/11,429.78 = 3,459.21/x
  3. Step 3: Cross multiply
    7,618.90x = 11,429.78 × 3,459.21
  4. Step 4: Simplify right side
    7,618.90x = 39,538,009.27
  5. Step 5: Solve for x
    x = 39,538,009.27/7,618.90
  6. Step 6: Final answer
    x = 5,189.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.