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Finding the Fourth Proportional to 14,866.50, 20,515.80 and 8,579.28

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Solution

The fourth proportional to 14,866.50, 20,515.80 and 8,579.28 is: 11,839.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,866.50 : 20,515.80 = 8,579.28 : x
  2. Step 2: Convert to fraction form
    14,866.50/20,515.80 = 8,579.28/x
  3. Step 3: Cross multiply
    14,866.50x = 20,515.80 × 8,579.28
  4. Step 4: Simplify right side
    14,866.50x = 176,010,792.62
  5. Step 5: Solve for x
    x = 176,010,792.62/14,866.50
  6. Step 6: Final answer
    x = 11,839.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.