Home / 6,421.28-9,629.64-2,260.40

Finding the Fourth Proportional to 6,421.28, 9,629.64 and 2,260.40

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Solution

The fourth proportional to 6,421.28, 9,629.64 and 2,260.40 is: 3,389.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.28 : 9,629.64 = 2,260.40 : x
  2. Step 2: Convert to fraction form
    6,421.28/9,629.64 = 2,260.40/x
  3. Step 3: Cross multiply
    6,421.28x = 9,629.64 × 2,260.40
  4. Step 4: Simplify right side
    6,421.28x = 21,766,838.26
  5. Step 5: Solve for x
    x = 21,766,838.26/6,421.28
  6. Step 6: Final answer
    x = 3,389.80

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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.