Home / 20,890,311.22-28,830,701.01-11,722,990.42

Finding the Fourth Proportional to 20,890,311.22, 28,830,701.01 and 11,722,990.42

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Solution

The fourth proportional to 20,890,311.22, 28,830,701.01 and 11,722,990.42 is: 16,178,889.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890,311.22 : 28,830,701.01 = 11,722,990.42 : x
  2. Step 2: Convert to fraction form
    20,890,311.22/28,830,701.01 = 11,722,990.42/x
  3. Step 3: Cross multiply
    20,890,311.22x = 28,830,701.01 × 11,722,990.42
  4. Step 4: Simplify right side
    20,890,311.22x = 337,982,031,742,114.31
  5. Step 5: Solve for x
    x = 337,982,031,742,114.31/20,890,311.22
  6. Step 6: Final answer
    x = 16,178,889.26

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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.