Home / 5,423.28-8,134.86-1,319.28

Finding the Fourth Proportional to 5,423.28, 8,134.86 and 1,319.28

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Solution

The fourth proportional to 5,423.28, 8,134.86 and 1,319.28 is: 1,978.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,423.28 : 8,134.86 = 1,319.28 : x
  2. Step 2: Convert to fraction form
    5,423.28/8,134.86 = 1,319.28/x
  3. Step 3: Cross multiply
    5,423.28x = 8,134.86 × 1,319.28
  4. Step 4: Simplify right side
    5,423.28x = 10,732,158.10
  5. Step 5: Solve for x
    x = 10,732,158.10/5,423.28
  6. Step 6: Final answer
    x = 1,978.91

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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.