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Finding the Fourth Proportional to 18,794,656.80, 28,191,985.20 and 9,818,042.40

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Solution

The fourth proportional to 18,794,656.80, 28,191,985.20 and 9,818,042.40 is: 14,727,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,794,656.80 : 28,191,985.20 = 9,818,042.40 : x
  2. Step 2: Convert to fraction form
    18,794,656.80/28,191,985.20 = 9,818,042.40/x
  3. Step 3: Cross multiply
    18,794,656.80x = 28,191,985.20 × 9,818,042.40
  4. Step 4: Simplify right side
    18,794,656.80x = 276,790,106,033,772.47
  5. Step 5: Solve for x
    x = 276,790,106,033,772.47/18,794,656.80
  6. Step 6: Final answer
    x = 14,727,063.60

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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.