Home / 21,709,197.96-29,958,715.80-12,890,409.36

Finding the Fourth Proportional to 21,709,197.96, 29,958,715.80 and 12,890,409.36

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Solution

The fourth proportional to 21,709,197.96, 29,958,715.80 and 12,890,409.36 is: 17,788,778.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,709,197.96 : 29,958,715.80 = 12,890,409.36 : x
  2. Step 2: Convert to fraction form
    21,709,197.96/29,958,715.80 = 12,890,409.36/x
  3. Step 3: Cross multiply
    21,709,197.96x = 29,958,715.80 × 12,890,409.36
  4. Step 4: Simplify right side
    21,709,197.96x = 386,180,110,561,899.88
  5. Step 5: Solve for x
    x = 386,180,110,561,899.88/21,709,197.96
  6. Step 6: Final answer
    x = 17,788,778.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.