Home / 21,389.55-32,089.80-8,905.43

Finding the Fourth Proportional to 21,389.55, 32,089.80 and 8,905.43

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Solution

The fourth proportional to 21,389.55, 32,089.80 and 8,905.43 is: 13,360.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.55 : 32,089.80 = 8,905.43 : x
  2. Step 2: Convert to fraction form
    21,389.55/32,089.80 = 8,905.43/x
  3. Step 3: Cross multiply
    21,389.55x = 32,089.80 × 8,905.43
  4. Step 4: Simplify right side
    21,389.55x = 285,773,394.11
  5. Step 5: Solve for x
    x = 285,773,394.11/21,389.55
  6. Step 6: Final answer
    x = 13,360.42

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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.