Home / 5,428.10-8,142.15-3,124.10

Finding the Fourth Proportional to 5,428.10, 8,142.15 and 3,124.10

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Solution

The fourth proportional to 5,428.10, 8,142.15 and 3,124.10 is: 4,686.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.10 : 8,142.15 = 3,124.10 : x
  2. Step 2: Convert to fraction form
    5,428.10/8,142.15 = 3,124.10/x
  3. Step 3: Cross multiply
    5,428.10x = 8,142.15 × 3,124.10
  4. Step 4: Simplify right side
    5,428.10x = 25,436,890.82
  5. Step 5: Solve for x
    x = 25,436,890.82/5,428.10
  6. Step 6: Final answer
    x = 4,686.15

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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.