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Finding the Fourth Proportional to 13,366,978.55, 20,093,278.35 and 12,419,242.10

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Solution

The fourth proportional to 13,366,978.55, 20,093,278.35 and 12,419,242.10 is: 18,668,638.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,366,978.55 : 20,093,278.35 = 12,419,242.10 : x
  2. Step 2: Convert to fraction form
    13,366,978.55/20,093,278.35 = 12,419,242.10/x
  3. Step 3: Cross multiply
    13,366,978.55x = 20,093,278.35 × 12,419,242.10
  4. Step 4: Simplify right side
    13,366,978.55x = 249,543,288,411,338.53
  5. Step 5: Solve for x
    x = 249,543,288,411,338.53/13,366,978.55
  6. Step 6: Final answer
    x = 18,668,638.35

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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.