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Finding the Fourth Proportional to 8,587,871.80, 12,881,807.70 and 8,219,289.40

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Solution

The fourth proportional to 8,587,871.80, 12,881,807.70 and 8,219,289.40 is: 12,328,934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,587,871.80 : 12,881,807.70 = 8,219,289.40 : x
  2. Step 2: Convert to fraction form
    8,587,871.80/12,881,807.70 = 8,219,289.40/x
  3. Step 3: Cross multiply
    8,587,871.80x = 12,881,807.70 × 8,219,289.40
  4. Step 4: Simplify right side
    8,587,871.80x = 105,879,305,481,448.38
  5. Step 5: Solve for x
    x = 105,879,305,481,448.38/8,587,871.80
  6. Step 6: Final answer
    x = 12,328,934.10

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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.