Home / 12,478,693.20-18,720,664.20-7,082,926.80

Finding the Fourth Proportional to 12,478,693.20, 18,720,664.20 and 7,082,926.80

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Solution

The fourth proportional to 12,478,693.20, 18,720,664.20 and 7,082,926.80 is: 10,625,879.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478,693.20 : 18,720,664.20 = 7,082,926.80 : x
  2. Step 2: Convert to fraction form
    12,478,693.20/18,720,664.20 = 7,082,926.80/x
  3. Step 3: Cross multiply
    12,478,693.20x = 18,720,664.20 × 7,082,926.80
  4. Step 4: Simplify right side
    12,478,693.20x = 132,597,094,175,980.55
  5. Step 5: Solve for x
    x = 132,597,094,175,980.55/12,478,693.20
  6. Step 6: Final answer
    x = 10,625,879.81

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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.