Home / 8,180.40-12,285.45-7,159.80

Finding the Fourth Proportional to 8,180.40, 12,285.45 and 7,159.80

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Solution

The fourth proportional to 8,180.40, 12,285.45 and 7,159.80 is: 10,752.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,180.40 : 12,285.45 = 7,159.80 : x
  2. Step 2: Convert to fraction form
    8,180.40/12,285.45 = 7,159.80/x
  3. Step 3: Cross multiply
    8,180.40x = 12,285.45 × 7,159.80
  4. Step 4: Simplify right side
    8,180.40x = 87,961,364.91
  5. Step 5: Solve for x
    x = 87,961,364.91/8,180.40
  6. Step 6: Final answer
    x = 10,752.70

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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.