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Finding the Fourth Proportional to 18,825,915.81, 25,978,672.40 and 10,565,206.75

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Solution

The fourth proportional to 18,825,915.81, 25,978,672.40 and 10,565,206.75 is: 14,579,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,825,915.81 : 25,978,672.40 = 10,565,206.75 : x
  2. Step 2: Convert to fraction form
    18,825,915.81/25,978,672.40 = 10,565,206.75/x
  3. Step 3: Cross multiply
    18,825,915.81x = 25,978,672.40 × 10,565,206.75
  4. Step 4: Simplify right side
    18,825,915.81x = 274,470,045,035,595.34
  5. Step 5: Solve for x
    x = 274,470,045,035,595.34/18,825,915.81
  6. Step 6: Final answer
    x = 14,579,372.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.