Home / 21,405,000-29,538,900.48-12,820,296

Finding the Fourth Proportional to 21,405,000, 29,538,900.48 and 12,820,296

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Solution

The fourth proportional to 21,405,000, 29,538,900.48 and 12,820,296 is: 17,692,008.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405,000 : 29,538,900.48 = 12,820,296 : x
  2. Step 2: Convert to fraction form
    21,405,000/29,538,900.48 = 12,820,296/x
  3. Step 3: Cross multiply
    21,405,000x = 29,538,900.48 × 12,820,296
  4. Step 4: Simplify right side
    21,405,000x = 378,697,447,668,142.06
  5. Step 5: Solve for x
    x = 378,697,447,668,142.06/21,405,000
  6. Step 6: Final answer
    x = 17,692,008.77

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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.