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Finding the Fourth Proportional to 12,387,611.40, 18,581,417.10 and 12,387,611.40

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Solution

The fourth proportional to 12,387,611.40, 18,581,417.10 and 12,387,611.40 is: 18,581,417.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387,611.40 : 18,581,417.10 = 12,387,611.40 : x
  2. Step 2: Convert to fraction form
    12,387,611.40/18,581,417.10 = 12,387,611.40/x
  3. Step 3: Cross multiply
    12,387,611.40x = 18,581,417.10 × 12,387,611.40
  4. Step 4: Simplify right side
    12,387,611.40x = 230,179,374,296,114.97
  5. Step 5: Solve for x
    x = 230,179,374,296,114.97/12,387,611.40
  6. Step 6: Final answer
    x = 18,581,417.10

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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.