Home / 21,389.64-32,089.92-8,905.50

Finding the Fourth Proportional to 21,389.64, 32,089.92 and 8,905.50

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Solution

The fourth proportional to 21,389.64, 32,089.92 and 8,905.50 is: 13,360.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.64 : 32,089.92 = 8,905.50 : x
  2. Step 2: Convert to fraction form
    21,389.64/32,089.92 = 8,905.50/x
  3. Step 3: Cross multiply
    21,389.64x = 32,089.92 × 8,905.50
  4. Step 4: Simplify right side
    21,389.64x = 285,776,782.56
  5. Step 5: Solve for x
    x = 285,776,782.56/21,389.64
  6. Step 6: Final answer
    x = 13,360.52

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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.