Home / 6,419.40-9,629.10-5,123.40

Finding the Fourth Proportional to 6,419.40, 9,629.10 and 5,123.40

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Solution

The fourth proportional to 6,419.40, 9,629.10 and 5,123.40 is: 7,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,419.40 : 9,629.10 = 5,123.40 : x
  2. Step 2: Convert to fraction form
    6,419.40/9,629.10 = 5,123.40/x
  3. Step 3: Cross multiply
    6,419.40x = 9,629.10 × 5,123.40
  4. Step 4: Simplify right side
    6,419.40x = 49,333,730.94
  5. Step 5: Solve for x
    x = 49,333,730.94/6,419.40
  6. Step 6: Final answer
    x = 7,685.10

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Similar ratio
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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.