Home / 5,428.40-8,142.90-1,533.12

Finding the Fourth Proportional to 5,428.40, 8,142.90 and 1,533.12

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Solution

The fourth proportional to 5,428.40, 8,142.90 and 1,533.12 is: 2,299.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.40 : 8,142.90 = 1,533.12 : x
  2. Step 2: Convert to fraction form
    5,428.40/8,142.90 = 1,533.12/x
  3. Step 3: Cross multiply
    5,428.40x = 8,142.90 × 1,533.12
  4. Step 4: Simplify right side
    5,428.40x = 12,484,042.85
  5. Step 5: Solve for x
    x = 12,484,042.85/5,428.40
  6. Step 6: Final answer
    x = 2,299.76

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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.