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Finding the Fourth Proportional to 18,811,705.26, 28,169,695.53 and 12,402,512.22

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Solution

The fourth proportional to 18,811,705.26, 28,169,695.53 and 12,402,512.22 is: 18,572,212.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811,705.26 : 28,169,695.53 = 12,402,512.22 : x
  2. Step 2: Convert to fraction form
    18,811,705.26/28,169,695.53 = 12,402,512.22/x
  3. Step 3: Cross multiply
    18,811,705.26x = 28,169,695.53 × 12,402,512.22
  4. Step 4: Simplify right side
    18,811,705.26x = 349,374,993,044,504.44
  5. Step 5: Solve for x
    x = 349,374,993,044,504.44/18,811,705.26
  6. Step 6: Final answer
    x = 18,572,212.79

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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.