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Finding the Fourth Proportional to 18,811,706.26, 28,169,697.03 and 12,402,513.22

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Solution

The fourth proportional to 18,811,706.26, 28,169,697.03 and 12,402,513.22 is: 18,572,214.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811,706.26 : 28,169,697.03 = 12,402,513.22 : x
  2. Step 2: Convert to fraction form
    18,811,706.26/28,169,697.03 = 12,402,513.22/x
  3. Step 3: Cross multiply
    18,811,706.26x = 28,169,697.03 × 12,402,513.22
  4. Step 4: Simplify right side
    18,811,706.26x = 349,375,039,817,969.75
  5. Step 5: Solve for x
    x = 349,375,039,817,969.75/18,811,706.26
  6. Step 6: Final answer
    x = 18,572,214.29

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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.