Home / 21,578.08-32,368.56-8,429.60

Finding the Fourth Proportional to 21,578.08, 32,368.56 and 8,429.60

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Solution

The fourth proportional to 21,578.08, 32,368.56 and 8,429.60 is: 12,644.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,578.08 : 32,368.56 = 8,429.60 : x
  2. Step 2: Convert to fraction form
    21,578.08/32,368.56 = 8,429.60/x
  3. Step 3: Cross multiply
    21,578.08x = 32,368.56 × 8,429.60
  4. Step 4: Simplify right side
    21,578.08x = 272,854,013.38
  5. Step 5: Solve for x
    x = 272,854,013.38/21,578.08
  6. Step 6: Final answer
    x = 12,644.96

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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.