Home / 12,258,278.72-18,381,266.40-7,142,361.92

Finding the Fourth Proportional to 12,258,278.72, 18,381,266.40 and 7,142,361.92

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Solution

The fourth proportional to 12,258,278.72, 18,381,266.40 and 7,142,361.92 is: 10,709,958.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,258,278.72 : 18,381,266.40 = 7,142,361.92 : x
  2. Step 2: Convert to fraction form
    12,258,278.72/18,381,266.40 = 7,142,361.92/x
  3. Step 3: Cross multiply
    12,258,278.72x = 18,381,266.40 × 7,142,361.92
  4. Step 4: Simplify right side
    12,258,278.72x = 131,285,657,176,735.47
  5. Step 5: Solve for x
    x = 131,285,657,176,735.47/12,258,278.72
  6. Step 6: Final answer
    x = 10,709,958.57

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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.