Home / 12,478,712.70-18,718,069.05-7,670,811.90

Finding the Fourth Proportional to 12,478,712.70, 18,718,069.05 and 7,670,811.90

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Solution

The fourth proportional to 12,478,712.70, 18,718,069.05 and 7,670,811.90 is: 11,506,217.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478,712.70 : 18,718,069.05 = 7,670,811.90 : x
  2. Step 2: Convert to fraction form
    12,478,712.70/18,718,069.05 = 7,670,811.90/x
  3. Step 3: Cross multiply
    12,478,712.70x = 18,718,069.05 × 7,670,811.90
  4. Step 4: Simplify right side
    12,478,712.70x = 143,582,786,813,761.72
  5. Step 5: Solve for x
    x = 143,582,786,813,761.72/12,478,712.70
  6. Step 6: Final answer
    x = 11,506,217.85

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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.