Home / 12,478,333.60-18,723,721.20-7,091,120.80

Finding the Fourth Proportional to 12,478,333.60, 18,723,721.20 and 7,091,120.80

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Solution

The fourth proportional to 12,478,333.60, 18,723,721.20 and 7,091,120.80 is: 10,640,216.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478,333.60 : 18,723,721.20 = 7,091,120.80 : x
  2. Step 2: Convert to fraction form
    12,478,333.60/18,723,721.20 = 7,091,120.80/x
  3. Step 3: Cross multiply
    12,478,333.60x = 18,723,721.20 × 7,091,120.80
  4. Step 4: Simplify right side
    12,478,333.60x = 132,772,168,854,720.95
  5. Step 5: Solve for x
    x = 132,772,168,854,720.95/12,478,333.60
  6. Step 6: Final answer
    x = 10,640,216.32

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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.