Home / 5,423.50-8,135.28-1,319.50

Finding the Fourth Proportional to 5,423.50, 8,135.28 and 1,319.50

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Solution

The fourth proportional to 5,423.50, 8,135.28 and 1,319.50 is: 1,979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,423.50 : 8,135.28 = 1,319.50 : x
  2. Step 2: Convert to fraction form
    5,423.50/8,135.28 = 1,319.50/x
  3. Step 3: Cross multiply
    5,423.50x = 8,135.28 × 1,319.50
  4. Step 4: Simplify right side
    5,423.50x = 10,734,501.96
  5. Step 5: Solve for x
    x = 10,734,501.96/5,423.50
  6. Step 6: Final answer
    x = 1,979.26

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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.