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Finding the Fourth Proportional to 18,397,871.70, 27,596,807.55 and 12,658,308.90

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Solution

The fourth proportional to 18,397,871.70, 27,596,807.55 and 12,658,308.90 is: 18,987,463.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,397,871.70 : 27,596,807.55 = 12,658,308.90 : x
  2. Step 2: Convert to fraction form
    18,397,871.70/27,596,807.55 = 12,658,308.90/x
  3. Step 3: Cross multiply
    18,397,871.70x = 27,596,807.55 × 12,658,308.90
  4. Step 4: Simplify right side
    18,397,871.70x = 349,328,914,621,752.19
  5. Step 5: Solve for x
    x = 349,328,914,621,752.19/18,397,871.70
  6. Step 6: Final answer
    x = 18,987,463.35

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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.