Home / 8,285.80-12,428.70-4,997.20

Finding the Fourth Proportional to 8,285.80, 12,428.70 and 4,997.20

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Solution

The fourth proportional to 8,285.80, 12,428.70 and 4,997.20 is: 7,495.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,285.80 : 12,428.70 = 4,997.20 : x
  2. Step 2: Convert to fraction form
    8,285.80/12,428.70 = 4,997.20/x
  3. Step 3: Cross multiply
    8,285.80x = 12,428.70 × 4,997.20
  4. Step 4: Simplify right side
    8,285.80x = 62,108,699.64
  5. Step 5: Solve for x
    x = 62,108,699.64/8,285.80
  6. Step 6: Final answer
    x = 7,495.80

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Half scale
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Similar ratio
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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.