Home / 5,428.20-8,126.10-4,780.20

Finding the Fourth Proportional to 5,428.20, 8,126.10 and 4,780.20

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Solution

The fourth proportional to 5,428.20, 8,126.10 and 4,780.20 is: 7,156.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.20 : 8,126.10 = 4,780.20 : x
  2. Step 2: Convert to fraction form
    5,428.20/8,126.10 = 4,780.20/x
  3. Step 3: Cross multiply
    5,428.20x = 8,126.10 × 4,780.20
  4. Step 4: Simplify right side
    5,428.20x = 38,844,383.22
  5. Step 5: Solve for x
    x = 38,844,383.22/5,428.20
  6. Step 6: Final answer
    x = 7,156.03

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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.