Home / 12,457,718.70-18,686,578.05-7,649,817.90

Finding the Fourth Proportional to 12,457,718.70, 18,686,578.05 and 7,649,817.90

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Solution

The fourth proportional to 12,457,718.70, 18,686,578.05 and 7,649,817.90 is: 11,474,726.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457,718.70 : 18,686,578.05 = 7,649,817.90 : x
  2. Step 2: Convert to fraction form
    12,457,718.70/18,686,578.05 = 7,649,817.90/x
  3. Step 3: Cross multiply
    12,457,718.70x = 18,686,578.05 × 7,649,817.90
  4. Step 4: Simplify right side
    12,457,718.70x = 142,948,919,256,637.09
  5. Step 5: Solve for x
    x = 142,948,919,256,637.09/12,457,718.70
  6. Step 6: Final answer
    x = 11,474,726.85

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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.