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Finding the Fourth Proportional to 21,392,993.70, 32,089,490.55 and 20,347,899.30

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Solution

The fourth proportional to 21,392,993.70, 32,089,490.55 and 20,347,899.30 is: 30,521,848.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,392,993.70 : 32,089,490.55 = 20,347,899.30 : x
  2. Step 2: Convert to fraction form
    21,392,993.70/32,089,490.55 = 20,347,899.30/x
  3. Step 3: Cross multiply
    21,392,993.70x = 32,089,490.55 × 20,347,899.30
  4. Step 4: Simplify right side
    21,392,993.70x = 652,953,722,299,701.62
  5. Step 5: Solve for x
    x = 652,953,722,299,701.62/21,392,993.70
  6. Step 6: Final answer
    x = 30,521,848.95

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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.