Home / 21,167,999.20-31,710,008.40-12,622,952.80

Finding the Fourth Proportional to 21,167,999.20, 31,710,008.40 and 12,622,952.80

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Solution

The fourth proportional to 21,167,999.20, 31,710,008.40 and 12,622,952.80 is: 18,909,389.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167,999.20 : 31,710,008.40 = 12,622,952.80 : x
  2. Step 2: Convert to fraction form
    21,167,999.20/31,710,008.40 = 12,622,952.80/x
  3. Step 3: Cross multiply
    21,167,999.20x = 31,710,008.40 × 12,622,952.80
  4. Step 4: Simplify right side
    21,167,999.20x = 400,273,939,320,803.50
  5. Step 5: Solve for x
    x = 400,273,939,320,803.50/21,167,999.20
  6. Step 6: Final answer
    x = 18,909,389.38

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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.