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Finding the Fourth Proportional to 5,403.81, 7,458.03 and 3,916.65

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Solution

The fourth proportional to 5,403.81, 7,458.03 and 3,916.65 is: 5,405.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,403.81 : 7,458.03 = 3,916.65 : x
  2. Step 2: Convert to fraction form
    5,403.81/7,458.03 = 3,916.65/x
  3. Step 3: Cross multiply
    5,403.81x = 7,458.03 × 3,916.65
  4. Step 4: Simplify right side
    5,403.81x = 29,210,493.20
  5. Step 5: Solve for x
    x = 29,210,493.20/5,403.81
  6. Step 6: Final answer
    x = 5,405.54

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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.