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Finding the Fourth Proportional to 21,898.40, 32,840.40 and 8,045.60

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Solution

The fourth proportional to 21,898.40, 32,840.40 and 8,045.60 is: 12,065.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,898.40 : 32,840.40 = 8,045.60 : x
  2. Step 2: Convert to fraction form
    21,898.40/32,840.40 = 8,045.60/x
  3. Step 3: Cross multiply
    21,898.40x = 32,840.40 × 8,045.60
  4. Step 4: Simplify right side
    21,898.40x = 264,220,722.24
  5. Step 5: Solve for x
    x = 264,220,722.24/21,898.40
  6. Step 6: Final answer
    x = 12,065.75

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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.