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Finding the Fourth Proportional to 13,205,999.90, 19,808,999.87 and 13,205,999.90

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Solution

The fourth proportional to 13,205,999.90, 19,808,999.87 and 13,205,999.90 is: 19,808,999.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,205,999.90 : 19,808,999.87 = 13,205,999.90 : x
  2. Step 2: Convert to fraction form
    13,205,999.90/19,808,999.87 = 13,205,999.90/x
  3. Step 3: Cross multiply
    13,205,999.90x = 19,808,999.87 × 13,205,999.90
  4. Step 4: Simplify right side
    13,205,999.90x = 261,597,650,236,290
  5. Step 5: Solve for x
    x = 261,597,650,236,290/13,205,999.90
  6. Step 6: Final answer
    x = 19,808,999.87

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1.5x scale

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.