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Finding the Fourth Proportional to 18,893,865.30, 28,298,807.55 and 15,534,633.30

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Solution

The fourth proportional to 18,893,865.30, 28,298,807.55 and 15,534,633.30 is: 23,267,425.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,893,865.30 : 28,298,807.55 = 15,534,633.30 : x
  2. Step 2: Convert to fraction form
    18,893,865.30/28,298,807.55 = 15,534,633.30/x
  3. Step 3: Cross multiply
    18,893,865.30x = 28,298,807.55 × 15,534,633.30
  4. Step 4: Simplify right side
    18,893,865.30x = 439,611,598,116,521.44
  5. Step 5: Solve for x
    x = 439,611,598,116,521.44/18,893,865.30
  6. Step 6: Final answer
    x = 23,267,425.23

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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.