Home / 11,780.40-17,670.60-8,281.20

Finding the Fourth Proportional to 11,780.40, 17,670.60 and 8,281.20

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Solution

The fourth proportional to 11,780.40, 17,670.60 and 8,281.20 is: 12,421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,780.40 : 17,670.60 = 8,281.20 : x
  2. Step 2: Convert to fraction form
    11,780.40/17,670.60 = 8,281.20/x
  3. Step 3: Cross multiply
    11,780.40x = 17,670.60 × 8,281.20
  4. Step 4: Simplify right side
    11,780.40x = 146,333,772.72
  5. Step 5: Solve for x
    x = 146,333,772.72/11,780.40
  6. Step 6: Final answer
    x = 12,421.80

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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.