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Finding the Fourth Proportional to 14,909.88, 20,578.71 and 8,624.28

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Solution

The fourth proportional to 14,909.88, 20,578.71 and 8,624.28 is: 11,903.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,909.88 : 20,578.71 = 8,624.28 : x
  2. Step 2: Convert to fraction form
    14,909.88/20,578.71 = 8,624.28/x
  3. Step 3: Cross multiply
    14,909.88x = 20,578.71 × 8,624.28
  4. Step 4: Simplify right side
    14,909.88x = 177,476,557.08
  5. Step 5: Solve for x
    x = 177,476,557.08/14,909.88
  6. Step 6: Final answer
    x = 11,903.29

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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.