Home / 13,245,811.20-19,868,716.80-12,461,990.40

Finding the Fourth Proportional to 13,245,811.20, 19,868,716.80 and 12,461,990.40

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Solution

The fourth proportional to 13,245,811.20, 19,868,716.80 and 12,461,990.40 is: 18,692,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245,811.20 : 19,868,716.80 = 12,461,990.40 : x
  2. Step 2: Convert to fraction form
    13,245,811.20/19,868,716.80 = 12,461,990.40/x
  3. Step 3: Cross multiply
    13,245,811.20x = 19,868,716.80 × 12,461,990.40
  4. Step 4: Simplify right side
    13,245,811.20x = 247,603,758,021,918.75
  5. Step 5: Solve for x
    x = 247,603,758,021,918.75/13,245,811.20
  6. Step 6: Final answer
    x = 18,692,985.60

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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.