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Finding the Fourth Proportional to 12,909,701.80, 19,364,552.70 and 12,321,836.20

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Solution

The fourth proportional to 12,909,701.80, 19,364,552.70 and 12,321,836.20 is: 18,482,754.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909,701.80 : 19,364,552.70 = 12,321,836.20 : x
  2. Step 2: Convert to fraction form
    12,909,701.80/19,364,552.70 = 12,321,836.20/x
  3. Step 3: Cross multiply
    12,909,701.80x = 19,364,552.70 × 12,321,836.20
  4. Step 4: Simplify right side
    12,909,701.80x = 238,606,846,455,667.72
  5. Step 5: Solve for x
    x = 238,606,846,455,667.72/12,909,701.80
  6. Step 6: Final answer
    x = 18,482,754.30

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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.