Home / 19,317.28-28,966.08-8,920

Finding the Fourth Proportional to 19,317.28, 28,966.08 and 8,920

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Solution

The fourth proportional to 19,317.28, 28,966.08 and 8,920 is: 13,375.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,317.28 : 28,966.08 = 8,920 : x
  2. Step 2: Convert to fraction form
    19,317.28/28,966.08 = 8,920/x
  3. Step 3: Cross multiply
    19,317.28x = 28,966.08 × 8,920
  4. Step 4: Simplify right side
    19,317.28x = 258,377,433.60
  5. Step 5: Solve for x
    x = 258,377,433.60/19,317.28
  6. Step 6: Final answer
    x = 13,375.46

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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.